Aa - Alg, All - And, Ang - Ay |Baa - Bak, Bal - Baro, Barr - Beam, Bean - Benj, Benn - Blib, Bill - Bliv, Blo - Bov, Bow - Brant, Bras - Brou, Brow - Brown, Bru - Burnh, Burns - Byr |Cab - Caro, Carp - Cas, Cat - Chils, Chit - Clark, Clas - Cold, Cole - Conl, Conn - Coot, Cope - Cow, Cox - Cross, Crote - Cy |Dab - Dav, Daw - Dens, Dent - Dix, Doa - Dow, Dox - Dy |Ea - Ell , Elm - Ey |Faa - Fero, Ferr - Flet, Fling - Fral, Fran - Fyn |Ga - Gat, Gau - Glass, Glasse - Gow, Gra - Gree, Greg - Gy |Haa - Hal, Ham - Harro, Harry - Haw, Hay - Hene, Heni - Hicks, Hie - Hock, Hod - Hopt, Hor - Hopk, Hopp - Huf, Hug - Hy |I |Ja - Johnso, Johnst - Ju |Ka - Kenda, Kendr - Kipp, Kir - Ky |La - Las, Lat - Leok, Leon - Lock, Lodes - Ly |Mab - Marr, Mars - Maz, McA - McE, McF - McL, McM - Mem, Men - Milla, Mille - Moon, Moor - Mosm Moss - Murl, Murn - My |Na - Ney, Ni - Ny |Oa - Om, On - Oz |Pa - Pat, Pau - Peu, Pf - Poor, Pop - Py |Q |Ra - Rav, Reg - Ril, Rim - Roll, Rom - Ry |Sa - Schm, Schn - Sel, Sem - Sherl, Sherm - Silli, Sils - Slay, Sle - Smi, Smo - Stag, Stah - Stek, Steu - Stok, Stol - Stud, Stum - Sy |Ta - Thi, Tho - Top, Tor - Ty |U |V |Wa - Walt, Walw - Way, We - Wer, Wes - White, Whitf - Wilg, Wilh - Wilm, Wils - Wom, Woo - Wy |Y |Z
| Last | First | Middle | Rank | CO | Regiment | Fld | Service | State | County | Town | Cemetery | State Buried |
| Oak | Charles | Corp. | H | 8 | th | H. Artillery | NY | Genesee | E. Oakfield | E.Oakfield | NY | |
| Oakes | Charles | L | Private | 12 | th | Cavalry | Penn | Erie | Hamburg | Prospect Lawn | NY | |
| Oakes | Elijah | Private | A | 187 | th | Vol. Infantry | NY | Cattaraugus | Franklinville | Cadiz | NY | |
| Oakes | James | Private | C | 90 | th | Vol. Infantry | NY | Orleans | Lyndonville | Rt. 63 | NY | |
| Oakley | Zachourah | Deyoe | Private | A | 90 | th | Vol. Infantry | NY | Cattaraugus | Portville | Chestnut Hill | NY |
| Oakley | George | Washington | Private | F | 90 | th | Vol. Infantry | NY | Cattaraugus | Portville | Chestnut Hill | NY |
| Oakley | Theodor | Private | B | 136 | th | Vol. Infantry | Ohio | Erie | Cheektowaga | Mt. Hope | NY | |
| Oakley | Alexander | Private | 3 | rd | Artillery | NY | Steuben | Kiefer Corners | Kiefer Corners | NY | ||
| Oaks | Leonard | L | Private | I | 188 | th | Vol. Infantry | NY | Cattaraugus | Great Valley | Green | NY |
| Oaks | John | Private | K | 112 | th | Vol. Infantry | NY | Cattaraugus | Dayton | Cottage | NY | |
| Oatman | William | Private | C&I | 97 | th | Vol. Infantry | NY | Steuben | Bath | V Hospital | NY | |
| Oatwater | Simeon | Corp. | M | 1 | st | Lt. Artillery | NY | Niagara | Olcott | W. Lake | NY | |
| Obermeyer | Ernst | Private | E | 116 | th | Vol. Infantry | NY | Erie | Cheektowaga | German/French #1 | NY | |
| O'Boyle | James | Private | I | 35 | th | Vol. Infantry | Penn | Steuben | Bath | V Hospital | NY | |
| O'Brian | Charles | Private | D | 164 | th | Vol. Infantry | NY | Erie | Buffalo | Forest Lawn | NY | |
| O'Brian | John | Private | A | 63 | rd | Vol. Infantry | NY | Adams | Gettysburg | National | Penn. | |
| O'Brian | Michael | Private | E | 72 | nd | Vol. Infantry | NY | McKeans | Bradford | Oak Hills | Penn. | |
| O'Brian | William | Private | A | 8 | th | Cavalry | NY | Sumpter | Andersonville | National | Ga. | |
| O'Brian | William | Private | UNS | 16 | th | Cavalry | NY | Orleans | Medina | St. Mary's | NY | |
| O'Brien | Patrick | Private | 1 | st | Cavalry | NY | Steuben | Bath | V Hospital | NY | ||
| O'Brien | Charles | 2d Lt. | 37 | th | Vol. Infantry | NY | Cattaraugus | East Otto | East Hill | NY | ||
| O'Brien | Edward | CoalHeaver | 0 | Navy | US | Steuben | Bath | V Hospital | NY | |||
| O'Brien | Jeremiah | Private | C | 8 | th | H. Artillery | NY | Orleans | Albion | St.Josephs | NY | |
| O'Brien | John | Corp. | H | 82 | nd | Vol. Infantry | NY | Adams | Gettysburg | National | Penn. | |
| O'Brien | Lawrence | Private | G | 25 | th | Vol. Infantry | NY | Steuben | Bath | V Hospital | NY | |
| O'Brien | Matthew | Private | C | 105 | th | Vol. Infantry | NY | Cattaraugus | Ellicottville | Holy Cross | NY | |
| O'Brien | Michael | Landsman | 0 | Navy | US | Steuben | Bath | V Hospital | NY | |||
| O'Brien | Michael | Private | D | 22 | nd | Cavalry | NY | Steuben | Bath | V Hospital | NY | |
| O'Brien | Michael | H | Private | I | 71 | st | Vol. Infantry | NY | Cattaraugus | Allegany | St. Bonaventure | NY |
| O'Brien | Patrick | Private | 12 | th | Ind. Batt. | NY | Steuben | Bath | V Hospital | NY | ||
| O'Brien | Thomas | Private | L | 14 | th | H. Artillery | NY | Steuben | Bath | V Hospital | NY | |
| O'Brien | Thomas | R | Private | C | 93 | rd | Vol. Infantry | NY | Steuben | Bath | V Hospital | NY |
| O'Brien | James | J | Private | H | 111 | th | Vol. Infantry | NY | Cayuga | Cato | Union Hill | NY |
| O'Brien | James | Private | D | 69 | th | Vol. Infantry | NY | Hanover | Mechanicsville | Cold Harbor | Va. | |
| O'Brien | Patrick | Private | H | 33 | rd | Vol. Infantry | NY | Ontario | Geneva | Catholic | NY | |
| O'Brien | John | Private | E | 8 | th | Vol. Infantry | NY | Monroe | Rochester | Mt. Hope | NY | |
| O'Brien | James | Private | Unas. | 64 | th | Vol. Infantry | NY | Cattaraugus | Humphrey | St. Pacificus | NY | |
| O'Brien | Patrick | Private | D | 5 | th | Vet Vol. Infantry | NY | Steuben | Bath | V Hospital | NY | |
| O'Brien | John | Private | A | 2 | nd | H. Artillery | NY | Steuben | Bath | V Hospital | NY | |
| O'Bryan | Philip | Private | E | 81 | st | Vol. Infantry | NY | Steuben | Bath | V Hospital | NY | |
| Oburkhaus | Edward | Private | F | 24 | th | Vol. Infantry | NY | Steuben | Bath | V Hospital | NY | |
| Ockerman | William | Private | G | 64 | th | Vol. Infantry | NY | Allegany | Scio | Fairlawn | NY | |
| Ockert | Frederick | Private | I | 29 | th | Vol. Infantry | NY | Steuben | Bath | V Hospital | NY | |
| O'Connell | William | Landsman | 0 | Navy | US | Steuben | Bath | V Hospital | NY | |||
| O'Connell | Morris | Private | 0 | Marines | US | Cattaraugus | Ellicottville | Holy Cross | NY | |||
| O'Connell | Stephen | Private | K | 5 | th | H. Artillery | NY | Cattaraugus | Ellicottville | Holy Cross | NY | |
| O'Conner | Arthur | Private | I/D | 151 | st | Vol. Infantry | NY | Genesee | LeRoy | St.Francis | NY | |
| O'Conner | Chas | Corp. | K | 155 | th | Vol. Infantry | NY | Erie | Lackawana | Holy Cross | NY | |
| O'Conner | Christopher | Private | C | 4 | th | H. Artillery | NY | Steuben | Bath | V Hospital | NY | |
| O'Conner | James | Private | 21 | st | Vol. Infantry | NY | Erie | Lackawana | Holy Cross | NY | ||
| O'Conner | John | Corp. | K | 151 | st | Vol. Infantry | NY | Spotsylvania | National | Va. | ||
| O'Conner | James | Private | D | 16 | th | Reg. Infantry | US | Monroe | Rochester | Holy Sepulcher | NY | |
| O'Conner | John | F | Private | G | 25 | th | Vol. Infantry | NY | Kent | Grand Rapids | Veterans | Mich. |
| O'Conner | James | Private | I | 5 | th | Vol. Infantry | NY | Livingaton | Dansville | Greenmont | NY | |
| O'Conners | Thomas | Private | E | 72 | nd | Vol. Infantry | NY | Chautauqua | Dunkirk | St. Mary's | NY | |
| O'Connor | John | Private | H | 21 | st | Vol. Infantry | NY | Erie | Buffalo | Forest Lawn | NY | |
| O'Connor | Thomas | Private | G | 102 | nd | Vol. Infantry | NY | Steuben | Bath | V Hospital | NY | |
| O'Connor | James | Private | G | 90 | th | Vol. Infantry | Ill. | Steuben | Bath | V Hospital | NY | |
| O'Connor | Joseph | Private | G | 6 | th | Cavalry | US | Steuben | Bath | V Hospital | NY | |
| O'Connor | Owen | W | Private | H | 147 | th | Vol. Infantry | NY | Erie | Lackawana | Holy Cross | NY |
| O'Connor | Calahan | Private | 12 | th | Inf. ?? | NY | Cayuga | Auburn | Cold Springs | NY | ||
| O'Connor | Thomas | A | Private | H | 149 | th | Vol. Infantry | NY | Steuben | Bath | V Hospital | NY |
| O'Day | Daniel | Private | F | 141 | st | Vol. Infantry | NY | Steuben | Hornell | Rural | NY | |
| O'Day | Michael | Seaman | 0 | Navy | US | Steuben | Bath | V Hospital | NY | |||
| O'Day/O'Dea | Michael | Private | 1 | st | Vet Cavalry | NY | */*--- | Lima | St. Rose | Ny | ||
| Odbert | R. | E | Private | F | 10 | th | H. Artillery | NY | Kent | Grand Rapids | Veterans | Mich. |
| Odell | Napoleon | B | Private | G | 124 | th | Vol. Infantry | NY | . | Wanaque | Midvale | NJ |
| Odell | Lymon | Private | D | 16 | th | H. Artillery | NY | Steuben | Bath | V Hospital | NY | |
| Odell | George | W | Private | H | 10 | th | Cavalry | NY | Adams | Gettysburg | Evergreen | Penn. |
| Odell | Joatham | Private | E | 22 | nd | Cavalry | NY | Steuben | Bath | V Hospital | NY | |
| Odell | Vincent | Private | F | 191 | st | Vol. Infantry | Penn | Erie | Buffalo | Forest Lawn | NY | |
| O'Dell | Albert | Private | B | 91 | st | Vol. Infantry | NY | Steuben | Bath | V Hospital | NY | |
| O'Dell | William | Private | B | 23 | rd | Vol. Infantry | NY | Allegany | Black Creek | Black Creek | NY | |
| O'Dell | Orren | P | Private | B | 23 | rd | Vol. Infantry | NY | Allegany | Black Creek | Black Creek | NY |
| O'Dell | James | Private | G | 69 | th | Vol. Infantry | NY | Erie | Buffalo | Forest Lawn | NY | |
| O'Dell | Theodore | Private | G | 188 | th | Vol. Infantry | NY | Newaygo | Fremont | Maple Grove | Mich. | |
| O'Dell | Charles | H | Private | F | 2 | nd | Mt. Rifles | NY | Wyoming | Arcade | Rural | NY |
| O'Dell | Henry | Private | F | 85 | th | Vol. Infantry | NY | Allegany | Black Creek | Black Creek | NY | |
| O'Dell | Charles | Private | 13 | th | Vol. Infantry | NY | Livingston | Libertypole | Erwin | NY | ||
| Odenbach | Peter | Private | D | 54 | th | Vol. Infantry | NY | Monroe | Rochester | Holy Sepulcher | NY | |
| O'Donnell | Martin | Seaman | 0 | Navy | US | Steuben | Bath | V Hospital | NY | |||
| O'Donnell | Anthony | Private | K | 2 | nd | Cavalry | NY | Steuben | Bath | V Hospital | NY | |
| O'Donnell | Hugh | Sergeant | H | 2 | nd | H. Artillery | Conn. | Livingston | Caledonia | Villege | NY | |
| O'Donnell | John | Private | B | 107 | th | Vol. Infantry | NY | Erie | Lackawana | Holy Cross | NY | |
| O'Donnell | Michael | F | Private | M | 2 | nd | H. Artillery | NY | Genesee | Batavia | St. Joseph's | NY |
| O'Donnell | Michael | Private | K | 4 | th | H. Artillery | NY | Monroe | Rochester | Holy Sepulcher | NY | |
| O'Donnell | William | Corp. | 16 | th | Lt. Artillery | NY | Steuben | Bath | V Hospital | NY | ||
| O'Donoghue | Roger | Private | K | 65 | th | Vol. Infantry | NY | Genesee | Batavia | St. Joseph's | NY | |
| O'Donohue | Timothy | Private | H | 13 | th | Vol. Infantry | NY | Monroe | Rochester | Holy Sepulcher | NY | |
| O'Doyle | James | Private | I | 35 | th | Vol. Infantry | Penn | Steuben | Bath | V Hospital | NY | |
| Oehler | Jacob | Private | 33 | rd | Vol. Infantry | NY | Erie | Cheektowaga | St. Johns | NY | ||