John Gill Commentary Joshua 21:5

"And the rest of the children of Kohath had by lot out of the families of the tribe of Ephraim, and out of the tribe of Dan, and out of the half-tribe of Manasseh, ten cities." — Joshua 21:5 (ASV)

And the rest of the children of Kohath Which did not descend from him in the line of Amram and Aaron, but of Izhar, Hebron, and Uzziel, who were not priests, but Levites:

[had] by lot out of the families of the tribe of Ephraim, and out of the tribe of Dan, and out of the half tribe of Manasseh, ten cities ; these other sort of Kohathites had their cities in tribes next to the other three where the Kohathites that were priests had theirs.