From a course I took in college, I’m no expert, but genetics typically criss cross.
That is, boys typically inherit moms longevity and predisposition to sicknesses, then it goes to your moms dad, and so on.
Obviously, factors, like smoking, diet, alcohol, mess with the predispositions.
Just another dumb fun fact in my head. Lol.
So, as far as Hal Richmond, the question is how long did his mom live?