Eleazar : Spanish Portuguese Galician and Haitian: from a Biblical male personal name Hebrew El‘azar meaning ‘God helps’ or ‘God is my salvation’ which was adopted in Latin as Eleazar. This was the name of a high priest son of Aaron and nephew of Moses. This surname is most common in the Philippines. In Haiti it is very rare.
Source :
DAFN2 : Dictionary of American Family Names 2nd edition, ©2022 by Patrick Hanks and Oxford University Press