Charles Ellicott Commentary 1 Chronicles 6:61

"And unto the rest of the sons of Kohath [were given] by lot, out of the family of the tribe, out of the half-tribe, the half of Manasseh, ten cities." — 1 Chronicles 6:61 (ASV)

And unto the sons of Kohath, which were left of the family of that tribe. —A comparison with Joshua 21:5 shows that the text is again mutilated. That passage reads (Hebrew): “And unto the sons of Kohath which were left, out of the families [clans] of the tribe of Ephraim, and out of the tribe of Dan, and out of the half of the tribe of Manasseh, by the lot, ten cities.” The curious redundancy of the present text of 1 Chronicles 6:61, “Out of the half of the tribe of the half of Manasseh”—a phrase which occurs nowhere else—suggests bad emendation of a corrupt reading. The passage from Joshua undoubtedly gives the meaning here. (Compare 1 Chronicles 6:66–67, below.)