| Family Names Being Researched | Period | Location:- City Town, Village or Region | County or State | Country | Membership Number |
| O’NEIL John & Ellen | 1850 + | Geelong | VIC | AUS | 10 |
| OATES Abraham | 1780 - 1800 | Middleton | NFK | ENG | 575 |
| ORRICK / ORROCK | c1750 - 1881 + | Newcastle Upon Tyne | NBL | ENG | 10 |
| PAIN / PAINE / PAYN / PAYNE | pre 1680 | Preston & Betterham | SFK | ENG | 10 |
| PALLETT | pre 1800 | Midlands | WAR / STS / WOR / SAL | ENG | 551 |
| PARKER | 1700 + | All | SFK | ENG | 323 |
| PARKER | 1820 - 1880 | Norwich | NFK | ENG | 30 |
| PARKER John | 1803 | Barton St David | SOM | ENG | 478 |
| PARKER Mary | 1775 | Hadleigh | SFK | ENG | 478 |
| PARKES Edward | c1820 + | Launceston | TAS | AUS | 616 |
| PARKES Elizabeth nee MITSON | c1820 + | Launceston | TAS | AUS | 616 |
| PATTEN | 1880 | Yambuk / Belfast | VIC | AUS | 111 |
| PATTERSON | 1820 + | Dundee | ANS | SCT | 30 |
| PEACOCK | pre 1750 | Little Waldingfield / Sudbury | SFK | ENG | 10 |
| PENNY | 1800 + | Castle Cary | SOM | ENG | 30 |
| PEPPERCORN | 1856 + | All | AUS | 10 | |
| PERCY | 1840 - 1852 | London | LND | ENG | 10 |
| PERCY | 1852 + | Buninyong | VIC | AUS | 10 |
| PERCY | pre 1842 | Ripley | SRY | ENG | 10 |
| PERRY | 1816 + | Wynbunbury | CHS | ENG | 19 |
| PETERSON | Orbost | VIC | AUS | 621 | |
| PHILLIPS | pre 1850 | Broughshane | ANT | IRL | 323 |
| PHILLIPS | 1800 + | Dublin | DUB | IRL | 323 |
| PHILLIPS | 1800 + | Liverpool | LAN | ENG | 323 |
| PHINN | c1804 | London | LND | ENG | 10 |
| PICKERING Rebekah | c1785 | Rushton | NTH | ENG | 478 |
| PIERSON | 1800 + | All | KEN | ENG | 323 |
| PIGGOTT James | 1795 | St Marylebone | LND | ENG | 31 |
| PINCOTT | Pre 1800 | Godalming | STI | SCT | 674 |
| PINCOTT | 1800 + | Bairnsdale Area | VIC | AUS | 674 |
| PINE Mary | 1835 + | COR | IRL | 478 | |
| PINE Mary | 1855 | Melbourne | VIC | AUS | 478 |
| PIPER | c1740 | Colyton | DEV | ENG | 19 |
| PLAISTED | 1850 + | SA / VIC / QLD | AUS | 10 | |
| PLENDERLEATH | c1800 | MLN | SCT | 566 | |
| POOL | pre 1860 | Paddington | MDX | ENG | 404 |
| PORTER | 1590 | Lavenham | SFK | ENG | 10 |
| POWEIL / POWELL Mary Ann | c1803 | Rothwell | ENG | 478 | |
| POWELL Francis | c1785 | Rushton | ENG | 478 | |
| PRIDDLE Elizabeth | 1780 - 1800 | Osmond | DOR | ENG | 575 |
| PRIOR | pre 1850 | All | NFK | ENG | 323 |
| PULLING | 1853 + | Melbourne area | VIC | AUS | 10 |
| PULLING | 1803 + | St Arnans | MON | WLS | 10 |
| QUINN Hugh | 1820 | FER | IRL | 616 | |
| QUINN Hugh | 1874 | Launceston | TAS | AUS | 616 |
| QUINN Rose Hannah nee GALLAGHER | 1905 | Launceston | TAS | AUS | 616 |
| QUINN Rose Hannah nee GALLAGHER | 1824 | FER | IRL | 616 | |
| QUINN Rose Hannah nee GALLAGHER | 1905 | South Yarra | VIC | AUS | 616 |