Beau Biden (Joseph R. Biden III) was born in 1969 and is now attorney general of Delaware.
Beau Bayh (Birch Evans Bayh IV) was born in 1995 and is a twin. His father, Birch Evans Bayh III, goes by the name Evan (with no “s”). His grandfather, Birch Evans Bayh II, was also an Indiana senator and ran for president in 1976.
Nothing earth-shattering, agreed. But still an unusual scenario.
As a further meandering aside: We have nobody named Beau (yet) in our 3200+ Who2 profiles.