Boyd’s Bible Dictionary:

(God, my God). (1) A chief of Manasseh (1 Chron. 5:2424And these were the heads of the house of their fathers, even Epher, and Ishi, and Eliel, and Azriel, and Jeremiah, and Hodaviah, and Jahdiel, mighty men of valor, famous men, and heads of the house of their fathers. (1 Chronicles 5:24)). (2) A forefather of Samuel (1 Chron. 6:3434The son of Elkanah, the son of Jeroham, the son of Eliel, the son of Toah, (1 Chronicles 6:34)). (3-4) Two chiefs of Benjamin (1 Chron. 8:20,2220And Elienai, and Zilthai, and Eliel, (1 Chronicles 8:20)
22And Ishpan, and Heber, and Eliel, (1 Chronicles 8:22)
). (5-6) Two heroes of David’s guard (1 Chron. 11:46-4746Eliel the Mahavite, and Jeribai, and Joshaviah, the sons of Elnaam, and Ithmah the Moabite, 47Eliel, and Obed, and Jasiel the Mesobaite. (1 Chronicles 11:46‑47)). (7) A Gadite (1 Chron. 12:1111Attai the sixth, Eliel the seventh, (1 Chronicles 12:11)). (8) A Levite (1 Chron. 15:9-119Of the sons of Hebron; Eliel the chief, and his brethren fourscore: 10Of the sons of Uzziel; Amminadab the chief, and his brethren an hundred and twelve. 11And David called for Zadok and Abiathar the priests, and for the Levites, for Uriel, Asaiah, and Joel, Shemaiah, and Eliel, and Amminadab, (1 Chronicles 15:9‑11)). (9) Overseer of Temple offerings (2 Chron. 31:1313And Jehiel, and Azaziah, and Nahath, and Asahel, and Jerimoth, and Jozabad, and Eliel, and Ismachiah, and Mahath, and Benaiah, were overseers under the hand of Cononiah and Shimei his brother, at the commandment of Hezekiah the king, and Azariah the ruler of the house of God. (2 Chronicles 31:13)).

Concise Bible Dictionary:

7. A Gadite who joined David at Ziklag (1 Chron. 12:1111Attai the sixth, Eliel the seventh, (1 Chronicles 12:11)): perhaps the same as No. 6.

Strong’s Dictionary of Hebrew Words:

from 410 repeated; God of (his) God; Eliel, the name of nine Israelites
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:

God of might: my God is El (i.e., God)

Potts’ Bible Proper Names:

To whom God is God; strength of strength:―name of nine Israelites, 1 Chron. 8:20. {Cui Deus est Deus}