| Name | Cemetery | County | Updated |
| O'NEILL, Cornelius | Saint John the Evangelist Roman (Riverhead) Cemetery | Suffolk | 2019-02-12 06:15:42 |
| O'NEILL, Dorothy H | Westhampton Cemetery | Suffolk | 2023-03-09 06:15:42 |
| O'NEILL, James | Long Island National Cemetery | Suffolk | 2015-11-29 13:15:12 |
| O'NEILL, James P. | Good Ground (Hampton Bays) Cemetery | Suffolk | 2015-11-29 13:15:12 |
| O'NEILL, John F | Saint James Catholic (Setauket) Cemetery | Suffolk | 2016-12-07 05:15:34 |
| O'NEILL, John J | Westhampton Cemetery | Suffolk | 2023-03-09 06:15:42 |
| O'NEILL, Katherine L | Saint James Catholic (Setauket) Cemetery | Suffolk | 2016-12-07 05:15:34 |
| O'NEILL, Marie | Sacred Hearts of Jesus and Mary (Southampton) Cemetery | Suffolk | 2021-11-18 06:15:33 |