|Easton's Bible Dictionary|
(1.) A son of Shimei, and grandson of Gershom (1 Chronicles 23:10).
(2.) One of the sons of Shelomoth, of the family of Kohath (1 Chronicles 24:22).
(3.) A Levite of the family of Merari, one of the overseers of the repairs of the temple under Josiah (2 Chronicles 34:12).
Int. Standard Bible Encyclopedia
ja'-hath (yachath, perhaps for yachteh, yachatheh, "he (God) will snatch up"):
(1) Son of Reaiah, son of Shobal, a descendant of Judah, and father of Ahumai and Lahad, the families of the Zorathites (1 Chronicles 4:2).
(2) A frequent name for a descendant of Levi:
(a) Son of Libni, son of Gershom, the eldest son of Levi (1 Chronicles 6:20, 43 (Hebrew 6:5, 28), where "son of Libni" is omitted).
(b) Son of Shimei, son of Gershom (1 Chronicles 23:10 f).
(c) One of the "sons" of Shelomoth, a descendant of Izhar, son of Kohath, the second son of Levi (1 Chronicles 24:22).
(d) A descendant of Merari, the third son of Levi, and an overseer in the repairing of the temple in the reign of Josiah (2 Chronicles 34:12).
Jahath (7 Occurrences)
1 Chronicles 4:2 Reaiah the son of Shobal became the father of Jahath; and Jahath became the father of Ahumai and Lahad. These are the families of the Zorathites. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
1 Chronicles 6:20 Of Gershom: Libni his son, Jahath his son, Zimmah his son, (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV)
1 Chronicles 6:43 the son of Jahath, the son of Gershom, the son of Levi. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
1 Chronicles 23:10 The sons of Shimei: Jahath, Zina, and Jeush, and Beriah. These four were the sons of Shimei. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
1 Chronicles 23:11 Jahath was the chief, and Zizah the second: but Jeush and Beriah didn't have many sons; therefore they became a fathers' house in one reckoning. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
1 Chronicles 24:22 Of the Izharites, Shelomoth; of the sons of Shelomoth, Jahath. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
2 Chronicles 34:12 The men did the work faithfully: and the overseers of them were Jahath and Obadiah, the Levites, of the sons of Merari; and Zechariah and Meshullam, of the sons of the Kohathites, to set it forward; and others of the Levites, all who were skillful with instruments of music. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)