Thomas was born about 1759 in MD. Thomas' father was Charles Gannon and his mother was Rebecca Perry. His paternal grandfather was Charles Gannon and his paternal grandmother is Rachel UNKNOWN. He had two brothers named Perry and James. He is the second oldest of the three children.
General Notes
1783 Talbot Co., MD, Island district, Tuckahoe and Kings Creek, Thomas GANNON.
1790 census Caroline Co., MD; 3 males over 16, 2 males under 16, 5 females.