Coaches
Head coaching tree
Coaches assistants who later became FBS head coaches and then theirs and so on and so on.
Conference
Team
Tom O'Brien · Boston College 1997-06, NC State 2007-12
20 FBS head coaches in his tree, up to six generations. Coaching data from Wikipedia.
Show20 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.