The purpose of this database is to help with your research and the research of others. It is quite possible that a member of the Genealogical Society has already done research for a portion of your family tree. This index of information has been made available for the use of all Butler County area researchers. Researchers requesting information about a particular surname will be forwarded on to the contributing member by our membership secretary. Please include the member number and the surnames you are interested in and send your request to membership@bcgs.us.
| MEMBER | SURNAME | COUNTRY | STATE | COUNTY | TIME PERIOD |
| 5601 | ACE | USA | PA | Clarion | 1800 - Present |
| 1701 | ALBERT | USA | PA | Butler | 1700s |
| 7702 | ALBERTSON | USA | PA | Philadelphia | 1700s |
| 1001 | ALDEN | ENG/USA | MA | 1598 - 1670 | |
| 6803 | ALEXANDER | USA | PA | Fayette, Washington, Butler | 1798 to date |
| 101 | ALLAMAN | GER/USA | PA | Clarion | 1800's - Present |
| 7608 | ALLEMONG | USA | PA | Westmoreland, Armstrong | 1790 - to date |
| 4601 | ALLEN | USA | PA | Butler | 1833-Present |
| 6201 | ALLISON | USA | PA | Butler | 1800 - Present |
| 501 | ALTMAN | PA | Clarion | 1840 - present | |
| 3701 | ALTMEIER | USA | PA | Butler | 1844-1847 |
| 3702 | ALTMEYER | USA | PA | Butler | 1844-1847 |
| 1601 | ANDERSON | USA | PA | Butler | 1900 - 2000 |
| 4301 | ANDERSON | USA | PA | Butler | 1844 - Present |
| 6507 | ANDERSON | USA | PA | Clarion | 1850 - 1860 |
| 7603 | ANDERSON | USA | PA | Armstrong | 1782 - to date |
| 201 | ANGERT | GER/USA | PA | Butler | 1650 - Present |
| 301 | BACHMAN | GER/USA | PA | Butler | 1835 - Present |
| 7719 | BACHMAN | Ger/USA | PA | Northampton, Northumberland | 1700s to1800s |
| 6813 | BAKER | USA | PA, MO | Butler, Lawrence | 1830 - 1950 |
| 4501 | BALDUFF | GER/PRU | 1620 - 1800's | ||
| 4502 | BALUFF | GER | 1590 - 1600's | ||
| 7201 | BAR/BAIR/BEAR/BEHR | USA | PA | Butler | 1850-1880 |
| 6820 | BARDON | USA | PA | Lawrence | 1836 - 1900 |
| 5602 | BARLETT | USA | PA | Clarion | 1800 - 1950 |
| 418 | BARNES | IRE/USA | PA | Butler | 1835 - Present |
| 4001 | BARNHART | ||||
| 4302 | BARR | USA | PA | Butler | 1845 - 1858 |
| 502 | BASHLINE | PA | Clarion | 1830-1870 | |
| 1002 | BASS | USA/CAN | MA, NS | 1650 - 1800 | |
| 3001 | BAST | USA | PA | Butler | |
| 4503 | BAULDOFF | GER/USA | PA | Butler | 1800's - Present |
| 6401 | BAULDOFF | AUS, USA | PA | Butler | 1600 to date |
| 7307 | BAULT | USA | PA | Crawford | 1800s |
| 6802 | BEATIE | USA | PA | Fayette, Butler | 1798 to date |
| 3901 | BEATTY | IRE/USA | PA | Butler | 1800 - Present |
| 6508 | BEIGE | USA | PA | Crawford | 1800 to date |
| 6509 | BEIGE | USA | PA | Lackawana | to 1790 |
| 2401 | BEITLER | USA | PA | Dauphin | 1835 - Present |
| 503 | BELL | PA | Venango | 1812 - present | |
| 3601 | BELL | USA | PA | Butler | |
| 7303 | BELL | USA | PA | Butler | 1840 - Present |
| 1201 | BELTRAMI | ITL/USA | PA | Butler | |
| 1101 | BENEIGH | ||||
| 3301 | BENNETT | USA | PA | Lawrence | 1800 - 1900 |
| 5401 | BENTON | USA | PA | Armstrong | 1840-1850 |
| 1501 | BERBERICK | USA | PA | Butler | 1840 |
| 7720 | BERGER | USA | PA | Northumberland, Montour | 1800s |
| 2001 | BERKEY | USA | PA | Berk, Somerset | 1733 - 1918 |
| 2002 | BERKSTRESSER | USA | PA | Bucks | 1684 - 1829 |
| 3002 | BERTSCHE | GER/USA | PA | Butler | 1840 |
| 504 | BEUSCHLEIN/BEISHLINE | PA | Berks | 1750 - 1830 | |
| 102 | BICKEL | GER/USA | PA | Butler | 1700s- Present |
| 3003 | BICKEL | GER/USA | PA | Butler | 1840 - ? |
| 2201 | BISHOP | USA | PA | Clearfield | 1830 - 1900 |
| 7704 | BIXBY | USA / Eng | PA / CT | Luzerne | 1600s and 1700s |
| 2701 | BLACK | USA | PA | Butler, Armstrong | 1800's to Present |
| 2901 | BLACK | USA | PA | Indiana | |
| 4701 | BLAIR | USA | PA | Butler | |
| 5402 | BLAKE | USA | PA | Armstrong | 1832-1850 |
| 7705 | BOEHM / BEAM | USA / Ger | PA | Berks, Columbia | 1700s and 1800s |
| 6001 | BOGERT | USA | NJ | Bergen | 1868 - 1946 |
| 4504 | BOLLI | SWZ | 1690 - 1902 | ||
| 4505 | BOLLY | SWZ/USA | IN | 1840 - Present | |
| 5603 | BOOCKS | USA | PA | Clarion | 1800 - Present |
| 3302 | BOOK | USA/GER | PA | Union, Butler | 1735 - Present |
| 3801 | BORTMAS | USA | PA | Butler | |
| 1702 | BOSTON | USA | PA | Butler | 1700s |
| 1202 | BOTTI | ITL/USA | PA | Butler | |
| 419 | BOUCH | USA | PA | Allegheny | 1900 - Present |
| 3602 | BOVARD | USA | OA | Butler | 1778 |
| 6604 | BOWSER | SWZ/USA | PA | Bedford/Armstrong/Butler | 1733 to date |
| 4506 | BOYD | USA | AR | Jefferson | 1851 - 1900's |
| 7004 | BOYD | USA | PA | Franklin/Lawrence | 1781-1868 |
| 7005 | BOYD | USA | PA | Lawrence/Butler | 1805-1858 |
| 5001 | BOYER | USA | PA | Berks, Butler | 1762 - Present |
| 6711 | BRANDON | USA | PA | Butler | 1870 to date |
| 4002 | BRANNAN | ||||
| 4003 | BRANNAND | ||||
| 4004 | BRANNON | ||||
| 3201 | BREITCH | GER/USA | PA | Allegheny, Lawrence | 1854 - 1901 |
| 4801 | BRICKEL | USA | PA | Butler | 1854 - Present |
| 2003 | BRIDGE | USA | PA | Westmoreland | 1808 - 1977 |
| 7706 | BRIGGS | USA | PA | Luzerne | 1800s |
| 3202 | BRINKLEY | USA | PA | Clarion | 1800 - 1927 |
| 1901 | BROWN | USA | PA, CA | PA - Butler | 1800 - Present |
| 505 | BRUBAKER | PA | Lancaster | 1760 - 1840 | |
| 506 | BRUBAKER | PA | Clearfield | 1839 - present | |
| 2702 | BRUNER | USA | PA | Butler, Armstrong | 1800's to Present |
| 2703 | BRUNER | USA | PA | Clarion, Jefferson | |
| 2704 | BRUNER | USA | PA | Westmoreland, Allegheny | |
| 1102 | BUCEY | USA | OH, PA | ||
| 3303 | BUCH | USA/GER | PA | Union, Butler | 1735 - Present |
| 3603 | BUCHAN | IRE/USA | PA | Butler | 1800 - |
| 3401 | BUCHANAN | IRE/USA | PA | Erie | 1800 - Present |
| 3604 | BUCHANAN | IRE/USA | PA | Butler | 1781 |
| 3402 | BUCHANON | IRE/USA | PA | Erie | 1800 - Present |
| 3605 | BUCHANON/BOCHANAN | IRE/USA | PA | Luzerne, Mercer | 1764 |
| 3403 | BUCKLEY | IRE | Cork | 1800's | |
| 2004 | BURGI | SWZ | 1680 - 1733 | ||
| 3802 | BURNS | USA | PA | Allegheny | |
| 3803 | BURR | USA | PA | Butler | |
| 4005 | BURROWS | ||||
| 4101 | BURTNER | PA | Butler/Allegheny | 1800s | |
| 2005 | BYERS | USA | PA | Somerset, Westmoreland | 1774 - 2003 |
| 2101 | BYERS | USA | PA | Butler | 1840 - Present |
| 2102 | BYERS | USA | PA | Armstrong | 1830 - |
| 2103 | BYERS | USA | PA | Westmoreland | 1795 - |
| 6202 | BYERS | USA | PA | Butler | 1800 - Present |
| 7214 | CALDWELL | USA | PA | Butler/Armstrong | 1820 to date |
| 3203 | CAMERON | USA | PA | Beaver, Lawrence | 1829 - 1887 |
| 103 | CAMPBELL | USA | PA | Butler | 1850 - Present |
| 901 | CAMPBELL | USA | PA | Butler,Westmoreland | 1820 - 1930 |
| 2202 | CAMPBELL | USA | PA | Indiana | 1810 - 1870 |
| 4901 | CAMPBELL | USA | PA | Butler | 1840 - 1857 |
| 6501 | CAMPBELL | USA | PA | Butler | to 1900 |
| 6502 | CAMPBELL | USA | PA | McKean | 1940 - 1970 |
| 6503 | CAMPBELL | USA | OK | Okmulgee | 1910 - 1930 |
| 6505 | CAMPBELL | USA | CO | Otero | 1905-1910 |
| 7219 | CAMPBELL | USA | PA | Butler/Lawrence | |
| 7301 | CAMPBELL | USA | PA | Butler | 1840 - Present |
| 7304 | CAMPBELL | USA | PA | Crawford | 1870s |
| 6818 | CANAN | USA | PA | Butler, Lawrence | 1820 - 1950 |
| 3902 | CARNAHAN | USA | PA | ||
| 302 | CARNER | USA | PA | Butler | 1840 - Present |
| 1203 | CARNOVALI | ITL/USA | PA | Butler | |
| 401 | CARSON | USA | PA | Lawrence | 1800-1860 |
| 402 | CARSON | USA | PA | Beaver | 1800-1830 |
| 403 | CARSON | USA | PA | Fayette | 1740-1800 |
| 404 | CARSON | USA | PA | Northumberland | 1730-1750 |
| 3204 | CARSON | IRE/USA | PA | Lawrence | 1799 - 1932 |
| 4902 | CHILDS | USA | PA | Butler | 1840 - 1857 |
| 104 | CHRISTY | USA | PA | Butler | 1850 - Present |
| 7215 | CHRISTY | USA | PA | Butler | |
| 7302 | CHRISTY | USA | PA | Butler | 1840 - Present |
| 1602 | CHRISTY/CHRISTIE | USA | PA | Butler, Lawrence | 1800 - 2000 |
| 2301 | CLARK | USA | PA | Butler ? | 1820 - 1860 |
| 4507 | CLARK | USA/SCT | PA, OH, IN | PA-Lane, OH-Stark, IN-Allen | 1750 - 1800's |
| 4903 | CLARK | USA | PA | Butler | 1840 - 1857 |
| 6806 | CLARK | USA | PA | Butler | 1830 - 1870 |
| 4508 | CLAUS | GER/USA | PA | Butler | 1800 - 1887 |
| 4509 | CLAUSE | USA | PA, IA, IL, CO | Butler, IA - Clinton, IL - Cass & Mason | 1830 - 1900's |
| 4510 | CLOUSE | USA | PA | Butler | 1800 - Present |
| 5201 | CLOUSE | USA | PA | Butler | 1801 - Present |
| 1103 | COEN | USA | PA, WV | 1700 - Present | |
| 6101 | COGHLAN | USA | OH, IA | 1861 - 1941 | |
| 2006 | COLE | IRE/USA/CAN | PA | Allegheny | 1891 - 1953 |
| 2402 | COLEMAN | USA | PA | Berks, Dauphin | 1745 - Present |
| 1104 | COLLINS | ||||
| 2801 | CONKLE | GER/USA | PA | Lancaster | 1710 - 1850's |
| 5701 | CONKLE | USA | PA | Lancaster | 1750 - Present |
| 3205 | CONNER | USA | PA | Lawrence | 1800 - 1900 |
| 5202 | CONWAY | IRE/USA | PA | Butler | 1764 - 1827 |
| 7217 | CONWAY | USA | PA | Butler | 1800 to date |
| 420 | COOPER | USA | PA | Butler | 1810 - Present |
| 6402 | COOPER | USA | PA | Butler | 1780 to date |
| 7505 | COOPER | USA | PA | Butler | 1783 - to date |
| 1502 | CORBLY | USA | PA | Clearfield | 1860 |
| 4006 | CORNELIUS | ||||
| 1204 | CORNETTI | ITL/USA | PA | Butler | |
| 5604 | COTHERMAN | USA | PA | Clarion, Venango | 1800 - Present |
| 5605 | COTTERMAN | USA | PA | Clarion, Venango | 1800 - Present |
| 6102 | COUGHLAN | USA | OH, IA | 1861 - 1941 | |
| 4007 | CRAIG | ||||
| 1603 | CRANMER | USA | PA | Butler | 1700 - 1800 |
| 6716 | CRATTY | USA | PA | Butler | 1800 - 1950 |
| 1301 | CRAWFORD | IRE/USA | PA | Butler | 1835 - |
| 1401 | CREBS | GER/USA | PA | Butler | 1800-1870 |
| 1003 | CROCKER | CAN | NS | Annapolis | 1800 - 1950 |
| 3404 | CRONIN | IRE | Cork | 1825 - 1860 | |
| 303 | CROOKS | USA | PA | Butler | 1803 - Present |
| 5702 | CROOKS | USA | PA | Butler | 1815 - Present |
| 4201 | CROWDER | USA | VA | Petersberg | 1880 - 1900 |
| 1302 | CROWE | IRE/USA | PA | Butler | 1891 - |
| 3206 | CROWE | USA | PA | Crawford | 1795 - 1969 |
| 3207 | CROWE | US | NY | Erie | 1795 - 1969 |
| 7406 | CROWL (?) | USA | PA | Butler | 1850 - 1890 |
| 2007 | CROYLE | IRE/USA | PA | Armstrong, Westmoreland, Allegheny | 1856 - |
| 3304 | CUNNINGHAM | USA | PA | Lawrence | 1750 - 1910 |
| 5901 | CUNNINGHAM | IRE | bef 1736 | ||
| 5902 | CUNNINGHAM | USA | PA | Lancaster | ca1736 |
| 5903 | CUNNINGHAM | USA | PA | Fayette | 1750 to 1912 |
| 5904 | CUNNINGHAM | USA | PA | Columbianna | ca 1831 |
| 5905 | CUNNINGHAM | USA | PA | Westmoreland | ca 1843 |
| 5906 | CUNNINGHAM | USA | PA | Butler | 1925 - 1935 |
| 6811 | CURRIE | USA | PA | Butler | 1840 - 1910 |
| 1402 | DAHM | GER/USA | PA | Butler, Allegheny | 1800-Present |
| 2302 | DAMBACHER | ALS/USA | PA | Beaver, Butler | 1830 - 1890 |
| 1205 | DAUBENSPECK | GER/USA | PA | Butler | |
| 7306 | DAUGHTERY | USA | PA | Crawford | 1800s |
| 1604 | DAVIS | USA | PA | Butler, Lawrence,Indiana, Cambria | 1800 - 2000 |
| 2303 | DAVIS | USA | PA | Westmoreland, Butler | 1787 -Present |
| 5101 | DAVIS | USA | PA | Clarion | 1870 - Present |
| 6103 | DAVIS | USA | PA | Butler | <1856 - 1952 |
| 3305 | DEAN | USA | PA | Huntingdon, Lawrence | 1700 - 1900 |
| 3306 | DEAN | IRE | |||
| 7210 | DELP | USA | PA | Butler/Crawford | 1865-? |
| 2501 | DENNY | USA | PA | Butler | |
| 1503 | DESMOND | USA | PA | Butler, Clearfield, Jefferson | 1886 - Present |
| 5703 | DIBELL | USA | PA | Butler | 1800 - Present |
| 1605 | DiBICCARI/DiBICCARO | ITA/USA |