1)
Who exiled whom?
1.
'Rashi': Na'aman, Achiyah and Gera exiled the Roshei Avos. Ralbag - it says Heglam (singular), for each of the three helped.
2.
Radak: Anshei Geva exiled Na'aman, Achiyah and Gera.
3.
Vilna Gaon Na'aman exiled those beginning with Avishu'a.
4.
Malbim: Echud, mentioned above (6), exiled Na'aman, Achiyah and Gera, the other Roshei Avos of the families that came from Na'aman ben Bela, so they will be together.
2)
Who fathered Uza and Achichud?
1.
Malbim: Echud, mentioned above (6).
