I assume you're referring to Breaking Dawn? In that case, EJ stands for Edward Jacob, what Bella would have named her baby had it been a boy.
E is Edward and J is Jacob.
EJ Caillouet goes by Ej, and Eeej.
Edward Jacob or Edward Junior it is not confirmed in the book
Ej Sepp's birth name is EJ Sepp.
The "EJ" in Captain E. J. Smith stands for "Edward John".
It's not "WW". It is "EJ" and represents the designer of the coin, Elizabeth Jones.
Ej Sepp is 6' 3".
EJ Assi is 5' 10".
EJ Caillouet is 5' 11".
Ej Linehan is 5' 8".
Holden EJ was created in 1962.
Kanam EJ died in 1982.