other schools, either kids of well-known alumni, or well-known football or basketball players whose dads were alumni of the same school. Anectdotally, it seems to me that BYU has actually done fairly well at this compared to other schools (this is not a pro-Bronco post; my comment cuts across sports and eras).
At other schools, here are the ones I could think of off the top of my head: Ely and Archie Manning (but not Peyton), Clay Matthews and son Clay, Tony and Anthony Dorsett, Whizzer and Danny White. But in most cases, when I could think of a well-known father-son athlete pair, the son played for a different university -- for example, Kellen Winslow, Tim Hardaway, Brian Griese, Matt & Tim Hasselbeck, Chris Long, Grant Hill, Glenn Robinson, Stephen Curry, Mike Shula, Chris Sims, Matthew Slater, Jeff Kemp, Peyton Manning, Adam James, and so on.
What other famous legacy kids can you think if who attended the same school as their athlete dad?