William married Martha Duke. Martha (daughter of Robert Duke and Mary Ruff) was born in 1749 in Stoughton, Sussex, England; was christened on 23 Dec 1749 in St Mary's Church, Stoughton, Sussex, England; died in 1826. [Group Sheet]

1. William Welch was born in 1771 in Stoughton, Sussex, England; was christened on 10 Mar 1771 in Stoughton, Sussex, England; died in 1816.
2. John Welch was born in 1773; died in 1773.
3. Mary Welch was born in 1774; and died.
4. James Welch was born in 1776; died in 1850.
5. Sarah Welch was born in 1779; died in 1836 in Portsea, Hampshire, England; was buried on 27 Nov 1836 in Portsea, Hampshire, England.
6. Nanny Welch was born in 1782 in Stoughton, Sussex, England; was christened on 28 Jan 1782 in St Mary's Church, Stoughton, Sussex, England; and died.
7. Benjamin Welch was born in 1784; died in 1830.
8. Elizabeth Welch was born in 1786; and died.
9. Charlotte Welch was born in 1789; and died.
10. George Welch was born in 1793; died in 1813.