Boyd’s Bible Dictionary:

(gift). (1) A son of Nathan (1 Chron. 2:36-3736And Attai begat Nathan, and Nathan begat Zabad, 37And Zabad begat Ephlal, and Ephlal begat Obed, (1 Chronicles 2:36‑37)), and one of David’s mighty men (1 Chron. 11:4141Uriah the Hittite, Zabad the son of Ahlai, (1 Chronicles 11:41)). (2) An Ephraimite whom the Gathites slew while on, a thieving expedition (1 Chron. 7:2121And Zabad his son, and Shuthelah his son, and Ezer, and Elead, whom the men of Gath that were born in that land slew, because they came down to take away their cattle. (1 Chronicles 7:21)). (3) Son of Shimeath, an Ammonitess, and one of the murderers of King Joash (2 Chron. 24:25-2625And when they were departed from him, (for they left him in great diseases,) his own servants conspired against him for the blood of the sons of Jehoiada the priest, and slew him on his bed, and he died: and they buried him in the city of David, but they buried him not in the sepulchres of the kings. 26And these are they that conspired against him; Zabad the son of Shimeath an Ammonitess, and Jehozabad the son of Shimrith a Moabitess. (2 Chronicles 24:25‑26)). Jozachar (2 Kings 12:2121For Jozachar the son of Shimeath, and Jehozabad the son of Shomer, his servants, smote him, and he died; and they buried him with his fathers in the city of David: and Amaziah his son reigned in his stead. (2 Kings 12:21)). (4) Three returned captives (Ezra 10:27,33,4327And of the sons of Zattu; Elioenai, Eliashib, Mattaniah, and Jeremoth, and Zabad, and Aziza. (Ezra 10:27)
33Of the sons of Hashum; Mattenai, Mattathah, Zabad, Eliphelet, Jeremai, Manasseh, and Shimei. (Ezra 10:33)
43Of the sons of Nebo; Jeiel, Mattithiah, Zabad, Zebina, Jadau, and Joel, Benaiah. (Ezra 10:43)

Strong’s Dictionary of Hebrew Words:

from 2064; giver; Zabad, the name of seven Israelites
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:

a giver

Potts’ Bible Proper Names:

He has given a dowry; endowed:―name of seven Israelites, 1 Chron. 2:36. {Donavit dotem}