Moose Malloy
G.O.A.T.
I'm trying to think of the other three father-son duos off the top of my head and am coming up blank.
If I remember correctly, Ruud's father never won a tournament. So, Petr and Seb Korda is all that immediately comes to mind.
I posted this last night in another thread:
Also Ben/Bryan become the 4th father son duo to win tour titles. The other 3 - Phil/Taylor Dent, Ramanathan/Ramesh Krishnan, Petr/Sebastian Korda.