Why does it say "l'Mishpechos ha'Kehasi"? It does not say so for Gershon or Merari!
Bi'ur ha'Gra: Kehas has two families
How did this lottery work?
Malbim: The Leviyim were split into four groups
Chomas Anach, citing Kli Yakar (Lani'ado): First the lottery said to give to the Kohanim amidst Yehudah (who is king), then to Shimon, who is amidst Yehudah