James Ussher stated that he was the son who underwent a circumcision on the way to Egypt. (Exodus 4:24-26 ) Most other authorities say that the circumcision happened to Gershom, not Eliezer. Because Eliezer was already alive, he cannot have been old enough to require circumcision.
The Bible gives no specific date for his death. Because he was not an adult at the beginning of the journey through the wilderness, he survived to enter Canaan. He had only one son, but that son had many sons. (1_Chronicles 23:15,17 )