Thomas married Elizabeth Hyde in 1742 in Belfast, Antrim, Northern Ireland, United Kingdom. Elizabeth (daughter of Samuel Hyde and Mary Arderne) was born about 1721 in Belfast, Antrim, Northern Ireland, United Kingdom; died on 11 Apr 1780 in Belfast, Antrim, Northern Ireland, United Kingdom. [Group Sheet] [Family Chart]

1. Thomas Gregg was born in Belfast, England; died in 1832 in Coles Park, Hertfordshire, England.
2. Eleanor Greg was born in 1759 in Belfast, Antrim, Northern Ireland, United Kingdom; died on 5 Nov 1847 in Kensington, London, England.
3. Eleanor Hyde was born about 1759; died on 5 Dec 1847.
4. Sarah Elizabeth Gregg was born on 8 Oct 1764 in Belfast, Antrim, Northern Ireland, United Kingdom; died on 2 Jun 1836 in England, Unitd Kingdom; was buried on 6 Nov 1836 in Toenham, Middlesex, England, United Kingdom.