The name Eleazer is a boy's name of Hebrew origin meaning "God is my helper". Eleazer and is often added to lists like Unique Baby Names: Unusual and Rare and discussed in our forums with posts like "Makeover name game: from one gender to the other".
From the experts:
Four-syllable names can be tricky, but this rarely used Old Testament appellation has considerable potential. In the Bible, Eleazer is a son of Aaron and nephew of Moses who succeeds his father as High Priest.