The son of Caleb & Elinor (Warfield) Dorsey of Anne Arundel Co MD, Thomas was baptized on 18 Jan 1727 at St Annes Parish in Anne Arundel Co MD. He married Anne Ridgely Worthington in 1746 in Anne Arundel Co MD; the daughter of Captain John Jr & Helen Heath (Hammond) Worthington, also of Anne Arundel Co.

Children with Anne:
1) Sarah Dorsey (b: 1747); m. Reuben Meriweather.
2) Caleb Dorsey (1749-1837); m. Elizabeth Worthington.
3) John Worthington Dorsey (1751-1823); m. Comfort Worthington (1758-1840).
4) Thomas Beale Dorsey Jr (1761-1828); m1. Achsah Dorsey (c1765-1806); m2. Achsah Riggs Brown (1786-1837).

The Dorsey Family and Allied Families, pg. 169:
"THOMAS BEALE DORSEY (Caleb, John, Edward), b. Jan. 18, 1727; d. Nov. 1, 1771 (Bible Record) Anne Arundel Co."

Anne Arundel County Church Records, Pg 94:
"St. Anne's Parish, Caleb Dorsey and Elinor, parents of Thomas Beale Dorsey son, b. 18 Jan 1727."

Anne Arundel County MD Gentry, Pgs 117, 118:
"Thomas Beale Dorsey, son of Caleb and Eleanor (Warfield) Dorsey, was born Jan 18, 1727, in St Ann's Parish, Anne Arundel Co MD.
"Thomas Beale Dorsey for a number of years was a member of the vestry of St Ann's Parish, serving at different times in the capacity of vestryman as well as warden."

Rootsweb:
Will Excerpts
Title- Will of Thomas Beale Dorsey, 1771
Source text- Calendar of Wills, Vol 14 (1767-1772)
Dorsey, Thomas Beale, Written 28 Oct 1771, Proved 13 Nov 1771-
To wife (unnamed).
Children: Caleb, John Worthington Dorsey, Thomas Beale Dorsey, Sarah Merreweather.
Tracts: Lower Quarter, Crosses Forest purchased of Thomas Sellman, Upper Quarter purchased of John Sellman and Ely Dorsey.
Exs: son Caleb and son-in-law Reuben Merreweather
Wit: John Hall, Eli Dorsey, Edward Thompson, 38 378"