Kyle has three brothers, Klayton, Kaleb and Kirk.
Korver's father, Kevin
Korver's uncle, Kris
His cousin Kari
first boy, Knox
second son, Koen
I assume none of their middle initials are K.
The Duggars are all Js.
The Korvers are all Ks.
The Balls are all Ls.
Rory: The Holyfields are all Es.
Lance is the son of Lance Sr. He has a younger brother named Lantz.