Susanah Pratt Allen was born circa 1693 in Sudbury, Middlesex County, Massachusetts to John Barnard Pratt (1663-1716) and Ruth Stimson (1664-1747) and died 16 February 1740 Shrewsbury, Worcester County, Massachusetts of unspecified causes. She married Obadiah Allen (1694-1781) 1714 in Framingham, Middlesex County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Daniel Allen (1721-1760) | |||
| Obadiah Allen (1723-1790) | |||
| Jonathan Allen (1725-) | |||
| Lucy Allen (1728-) | |||
| Miriam Allen (1730-1771) | |||
| Persis Allen (1736-1812) | 2 March 1736 Marlborough, Middlesex County, Massachusetts | 25 August 1812 Massachusetts | Joseph Gleason (1726-1805) |
Siblings
| Name | Birth | Death | Joined with |
| John Pratt (1691-1768) | |||
| Susanah Pratt (1693-1740) | 1693 Sudbury, Middlesex County, Massachusetts | 16 February 1740 Shrewsbury, Worcester County, Massachusetts | Obadiah Allen (1694-1781) |
| Isaac Pratt (1696-) | |||
| Amos Pratt (1699-1747) | |||
| Ruth Pratt (1701-) | |||
| Eleazer Pratt (1703-1749) | |||