The last one from GT is where Pan's( Gohan's daughter / Goku's Granddaughter) grandson named Goku Junior( Goku's great-great-grandson ) is fighting Vegeta Junior.
This was the last episode and Pan was old as **** and one of Bulma's descendents( maybe her granddaughter or great-granddaughter) was cheering on Vegeta Jr.
Also, the announcer from the Tenka'ichi Budōkai has a descendent at the Tournament as well.
SO, is it really too hard to believe it was a descendent of the old man?