As to the rest of the Kohathites belonging to the Kohathite clans of the Levites, the cities allotted to them were out of the tribe of Ephraim.
20. And the families of the children of Kohath, etc Why it was necessary that the Levites should be dispersed among the different tribes, the reader may see in my Commentaries on the Books of Moses. This dispersion had, indeed, been imposed on their progenitor as a punishment for the cruelty and perfidy of which he had been guilty toward the children of Shechem, but...
We have here a particular account of the cities which were given to the children of Levi out of the several tribes, not only to be occupied and inhabited by them, as tenants to the several tribes in which they lay - no, their interest in them was not dependent and precarious, but to be owned and possessed by them as lords and proprietors, and...
Commenting on Joshua 21:9-42
And the families of the children of Kohath, the Levites,.... Who were not priests: which remained of the children of Kohath; these are the children of Moses, as Jarchi says, and those that descended from Kohath in the lines of Izhar, Hebron, and Uzziel: even they had the cities of their lot out of the tribe of Ephraim; and were as follow.