Here's some names that I haven't seen thrown out there...
Gregg Gottlieb: Doug's brother is currently an assistant at Cal and was previously at San Diego State, and I have no idea if Cuonzo Martin plans to retain him. He can recruit California extremely well and I'm sure he's got great "Xs and Os" knowledge from sitting next to Mike Montgomery and Steve Fischer for so long.
Rob Moxley: Currently an assistant at North Carolina State who's very close with Bobby Lutz. He's been instrumental in getting some pro-caliber players to NCSU (they've had a surprising number of early NBA entries) and was there for Lutz's success at Charlotte. Maybe he'd prefer the stability of coaching under Fred over Mark Gottfried, who's likely bound for the hot seat.
Chris Caputo: Miami (FL) assistant who followed Jim Larranaga down from George Mason. He can recruit the Washington DC area very well, a recruiting hotbed that Frank Martin tapped when he was at Kansas State and doesn't get too heavily worked by Big 12 teams now that he's gone.