Ithrites

Boyd’s Bible Dictionary:

Two of David’s warriors so called
(2 Sam. 23:38; 1 Chron. 11:40).

Concise Bible Dictionary:

Designation of Ira and Gareb, two of David’s mighty men, described as among “the families of Kirjath-jearim,” which links them with Judah (2 Sam. 23:38; 1 Chron. 2:53; 1 Chron. 11:40).

Jackson’s Dictionary of Scripture Proper Names:

patronymic of Jether