When Thomas Forrester was born in 1739 in Hinstock, Shropshire, his father, Thomas, was 29 and his mother, Miriam, was 32. He married Hannah Sargant on 13 January 1763 in Market Drayton, Shropshire. They had one child during their marriage. He died in 1803 in Cheswardine, Shropshire, at the age of 64.