From BiblePortal Wikipedia

Hastings' Dictionary of the Bible [1]

JOZACAR. In   2 Kings 12:21 it is said that Jozacar ben-Shimeath and Jehozabad ben-Shomer murdered Joash. The parallel   2 Chronicles 24:26 makes it clear that there was but one murderer named, and that his name has been duplicated. Jozacar and Zechariah have the same meaning, ‘Jahweb remembers.’

W. F. Cobb.

Holman Bible Dictionary [2]

 2 Kings 12:21Jozachar

International Standard Bible Encyclopedia [3]

joz´a - kar , jṓ - zā´kar ( יוזכר , yōzākhār , "Yahweh has remembered"; the King James Version Jozachar ): Servant and murderer (with Jehozabad)of Joash, king of Judah (  2 Kings 12:21 (Hebrew 22)); called "Zabad" in   2 Chronicles 24:26 . Many manuscripts have "Jozabad" in 2 Kings.