Hello Chris, according to what I've found, your late father-in-law was my mothers' 4th cousin. That's through my great-great-great-grandfather Joseph Hodgkins (1812 - 1851), who was the brother of Benjamin Hodgkins (c.1801 - 1867), who would've been the great-great-grandfather of your father-in-law, through Benjamins' daughter Esther, who was the mother of Tenney, also spelt in records Tehenney, Thyana & Annie.
Can send more to your email address if you wish,
Sean