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
These are the names of the sons of Levi according to their generations: Gershon, Kohath, and Merari, the years of the life of Levi being 137 years.
The sons of Kohath: Amram, Izhar, Hebron, and Uzziel, the years of the life of Kohath being 133 years.
According to the number of all the males, from a month old and upward, there were 8,600, keeping guard over the sanctuary. The clans of the sons of Kohath were to camp on the south side of the tabernacle,
And their guard duty involved the ark, the table, the lampstand, the altars, the vessels of the sanctuary with which the priests minister, and the screen; all the service connected with these.
This was the list of the Levites according to their clans: of Gershon, the clan of the Gershonites; of Kohath, the clan of the Kohathites; of Merari, the clan of the Merarites.
And those listed were 23,000, every male from a month old and upward. For they were not listed among the people of Israel, because there was no inheritance given to them among the people of Israel.