Smith's Bible Dictionary (1863)
(enclosed), one of the thirty heroes of David’s guard. (2 Samuel 23:35) (B.C. 1046.) In the parallel list, (1 Chronicles 11:37) the name appears as HEZRO.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
HEZ'RAI (enclosed), one of David's warriors, 2 Sam 23:35; called Hezro in 1 Chr 11:37.
Hitchcock's Bible Names (1869)
an entry or vestibule