Coaches
Head coaching tree
Coaches assistants who later became FBS head coaches and then theirs and so on and so on.
Conference
Team
Bill Cubit · Western Michigan 2005-12, Illinois 2015
5 FBS head coaches in his tree, up to six generations. Coaching data from Wikipedia.
Show5 head coaches · confirmed by a second source · Wikipedia only · ▌current Power 4 head coach · ▌current FBS head coach · + ranked
His full career and every staff link: his coach page.