Bohemond's heir, Louis - who is Frankish where his father is Norman - isn't too shabby himself. He's not quite at the level of his father, but he's got 9 children. All sons. Four Frankish (father), Three Greek (province) - Heir among them -, and one Occitan (mother).
And he's Chaste.
Edit: His father now has 17 kids, after two bastards came when he was 55 and 56. Louis himself has chosen to go Celibate. Showing his true dedication to the church... if he didn't already have 9 kids.