Stearns433 gives Joseph Fitch’s birthdate as 1634 without any supporting evidence; Roscoe Conkling Fitch124 believes Joseph was probably born in New England as he “deposed 2(2) 1661, that his age was about twenty-three.” (The meaning of the numbers “2(2)” is not clear.) This would make Joseph’s birthdate 1638, which concurs with Roscoe Conklin Fitch’s revised immigration date for his father Zachary of 1637 or 1638.

Eaton’s Reading128 provides a number of details Joseph Fitch’s life.