Thomas Gregg was born 1688 in New Castle County, Delaware, United States to John Gregg (1668-1737) and Elizabeth Cooke (1673-?) and died 1 September 1748 Kennett, Chester County, Pennsylvania, United States of unspecified causes. He married Dinah Harlan (1707-1763) 1 February 1728 in New Garden, Chester County, Penmnsylvania, United States.
Thomas Gregg was born in 1701 in New Castle County, Delaware to John Gregg and Elizabeth Cooke. He married Dinah Harlan on February 20, 1728 in New Garden, Chester County, Penmnsylvania. Thomas died on September 1, 1748 in Kennett, Chester County, Pennsylvania.
Children
| Name | Birth | Death | Joined with |
| Mary Gregg (1729-?) | |||
| Michael Gregg (1731-?) | |||
| Thomas Gregg (1734-?) | |||
| Lydia Gregg (1736-?) | |||
| Dinah Gregg (1738-?) | |||
| Amy Gregg (1740-1771) | 2 September 1740 Kennett, Chester County, Pennsylvania, United States | 28 June 1771 Hockessin, Delaware, United States | James Wilson (1738-1820) |
| Stephen Gregg (1742-?) | |||
| Abigail Gregg (1746-?) | |||