Hebronites were in charge of both sides of the Jordan (1 Chr 26:30-26:37)

“Of the Hebronites, Hashabiah and his brothers, one thousand seven hundred men of ability, had the oversight of Israel west of the Jordan River for all the work of Yahweh and for the service of the king. Of the Hebronites, Jerijah was chief of the Hebronites. In the fortieth year of King David’s reign a search was made of genealogy or family. Men of great ability among them were found at Jazer in Gilead. King David appointed him and his brothers, two thousand seven hundred men of ability, heads of families, to have the oversight of the Reubenites, the Gadites, and the half-tribe of the Manassites for everything pertaining to God and for the affairs of the king.”

The Hebronites were also the grandchildren of Levi, via Kohath. These were the fighting or diplomatic Levites. There are a lot of Merarite Levites with the name of Hashabiah, but this Hashabiah is a Kohathite Levite. He and his brothers, about 1,700 men were in charge of the west bank of the Jordan River in the service of the king. On the other hand, Jerijah was the chief of the Hebronites. He and his brothers, about 2,700 men were in charge on the east bank of the Jordan River over the tribes of Reuben, Gad, and the half-tribe of Manasseh in the service of the king. Apparently, late in the rule of King David, they found some men with great ability at Jazer in the Gilead, where the Gadites ruled.