| Name | Birth date | Relationship with Robert Frei |
| Phillips, Levi Henry | Abt. 1852 | 1st cousin 3 times removed of the wife |
| Phillips, Mary | 10 Sep 1805 | 2nd cousin 5 times removed of the wife |
| Phillips, May | Abt. 1870 | 1st cousin 3 times removed of the wife |
| Phillips, Ruthe Margueritta | 26 Dec 1900 | 6th cousin twice removed of the wife |
| Phoenix, Erin McHaney | Private | 2nd cousin once removed |
| Pine, Edmund Stanley | Private | Husband of the 1st cousin once removed |
| Pine, Olivia | Private | 1st cousin twice removed |
| Pingston, Anna Johanna | 21 Sep 1860 | 2nd great-grandaunt |
| Pingston, Catherine | Abt. May 1870 | 2nd great-grandaunt |
| Pingston, Edward | 05 Oct 1855 | 2nd great-granduncle |
| Pingston, Frederick | Abt. 1827 | 3rd great-grandfather |
| Pingston, James | 05 Mar 1859 | 2nd great-granduncle |
| Pingston, John | Abt. 1862 | 2nd great-granduncle |
| Pingston, Julia | Abt. 1864 | 2nd great-grandaunt |
| Pingston, Martin | 10 May 1867 | 2nd great-granduncle |
| Pingston, Mary | Abt. Jan 1854 | 2nd great-grandmother |
| Pingston, Michael | 23 Aug 1865 | 2nd great-granduncle |
| Pingston, Sarah | Abt. 1852 | 2nd great-grandaunt |
| Pingston, Thomas | Abt. 1851 | 2nd great-granduncle |
| Pingston, William | Jul 1857 | 2nd great-granduncle |
| Pinion, Nicholas | | Husband of the 9th great-grandmother |
| Piper, Charlotte E. | Private | 5th cousin once removed of the wife |
| Piper, Gloria Ann | Private | 5th cousin once removed of the wife |
| Piper, Kedric | 07 Mar 1951 | 5th cousin once removed of the wife |
| Piper, Rose Marie | Private | 5th cousin once removed of the wife |
| Pixley, Grace | Private | Wife of the 1st cousin once removed |
| Plankey, Gene | Private | Husband of the 2nd cousin |
| Plankey, Jeffrey James | Private | 2nd cousin once removed |
| Plankey, Kristopher | Private | 2nd cousin once removed |
| Plants, Dale Anthony | Private | 2nd cousin of the wife |
| Plants, Derek Kyle | Private | 2nd cousin once removed of the wife |
| Plants, Jeannette Marie | Private | 2nd cousin of the wife |
| Plants, Kameron Tanner | Private | 2nd cousin once removed of the wife |
| Poitevin, Angelique Gibaut | Bef. 1677 | 6th great-grandmother of the wife |
| Poitevin, Gabriel Gibout | Bef. 1642 | 7th great-grandfather of the wife |
| Poitou, Adelaide of | Abt. 945 | 30th great-grandmother |
| Polmateer, Beulah | | 4th cousin once removed of the wife |
| Ponting, Cary | Private | Half 2nd cousin |
| Ponting, John | Private | Husband of the half 1st cousin once removed |
| Ponting, Kim | Private | Half 2nd cousin |
| Poppe, Albert | 30 Oct 1853 | 1st cousin 3 times removed of the wife |
| Poppe, Anna Catharina | 18 Mar 1829 | 2nd great-grandaunt of the wife |
| Poppe, Christoph | 27 Jun 1836 | 2nd great-granduncle of the wife |
| Poppe, Claus Hein | Abt. 1823 | 2nd great-granduncle of the wife |
| Poppe, Engel Marie | 23 Aug 1826 | 2nd great-grandmother of the wife |
| Poppe, Johann Christoph | Abt. 1800 | 3rd great-grandfather of the wife |
| Poppe, Johann Christoph | 21 Feb 1839 | 2nd great-granduncle of the wife |
| Poppe, Margarete | 19 Jul 1831 | 2nd great-grandaunt of the wife |
| Poppe, Margarete | 10 Nov 1852 | 1st cousin 3 times removed of the wife |
| Poppe, Marken | 16 Oct 1833 | 2nd great-grandaunt of the wife |