P
- Pilgrim Edward Doty Society
- Pilgrim Francis Cooke Society
- Pilgrim John Howland Society
- Pioneer Association of the State of Washington
- Pioneers of Alaska
- Piscataqua Pioneers
- Plantagenet Society
- Plymouth Hereditary Society
- Point Lookout Prisoner of War Organization
- Presidential Families of America
Read more about this topic: List Of Hereditary And Lineage Organizations