Smith's Bible Dictionary (1863)
(one who helps), one of the heads of the People who signed the covenant with Nehemiah. ) The name is probably that of a family, and in Hebrew is the same as is elsewhere represented by Azur.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
AZ'ZUR (helper), one who sealed the covenant. Neh 10:17.
Hitchcock's Bible Names (1869)
same as Azur