Reference: Kohathites
Easton
the descendants of Kohath. They formed the first of the three divisions of the Levites (Ex 6:16,18; Nu 3:17). In the journeyings of the Israelites they had the charge of the most holy portion of the vessels of the tabernacle, including the ark (Nu 4). Their place in the marching and encampment was south of the tabernacle (Nu 3:29,31). Their numbers at different times are specified (Nu 3:28; 4:36; 26:57,62). Samuel was of this division.
See Verses Found in Dictionary
Now these are the names of the sons of Levi, according to their records: Gershon, Kohath, and Merari. (The length of Levi's life was 137 years.)
The sons of Kohath were Amram, Izhar, Hebron, and Uzziel. (The length of Kohath's life was 133 years.)
Counting every male from a month old and upward, there were 8,600. They were responsible for the care of the sanctuary. The families of the Kohathites were to camp on the south side of the tabernacle.
Their responsibilities included the ark, the table, the lampstand, the altars, and the utensils of the sanctuary with which they ministered, the curtain, and all their service.
And these are the Levites who were numbered according to their families: from Gershon, the family of the Gershonites; of Kohath, the family of the Kohathites; from Merari, the family of the Merarites.
Those of them who were numbered were 23,000, all males from a month old and upward, for they were not numbered among the Israelites; no inheritance was given to them among the Israelites.