I would say three -- two father-son sets, the Adams and Bush families and one grandfather-grandson, the Harrisons.
The two Roosevelts were distantly related - 5th cousins and there are some other distant cousin relationships .
There was another "almost" father-son pair, the Tafts. President Taft' son Robert was an important Senator who was seriously considered for the presidential nomination.
14 presidents served as vice president before becoming president
9 members in the weasly family
How many members are in James cook's family
she has 3 family members
908 members of crew
Huh? One, the current president.
JFK and many others.
43
All of them.
11
8
17