I missed two NHL grandfathers in my post from earlier today.
Ron Hextall is the grandson of Bryan Hextall Sr., a great player with the New York Rangers way back in the 1940s. Note he is another Hall of Famer. Bryan Hextall Jr. also played in the NHL, as did Dennis Hextall, another son of Bryan Sr.
And the great Syl Apps, yet another Hall of Famer, is the patriarch of another three generation hockey family, although this one is a little bit different. Syl Apps Jr. was a good player in the 1970s NHL. Nowadays, grand-daughter Gillian Apps is one of the best female players in the world!