The Biblical meaning of E'li / Elias is my God or God with me.
In Jesus' language: Elias was his earthly father. (My God or God with me)
In Jesus' language: Our Father who art in heaven is Almighty God [his heavenly Father].
Scripturally, Elias was non-existent, a non-entity as a visible being. The existing physical entity was John the Baptist. In person, in spirit and in power John was the reality. Elias was the shadow.
Elias was synonymous with John in name and in reference (
Mark 6:15; 8:28; Luke 1:17). John was Elias in reality. John in person fulfilled scriptural prophesies of '
Elias which was for to come' (
Matt 11:14). The presence of Elias/John was the awaited sign that was to signal the Messiah's advent. Elias/John was to '
pave the way' for the Messiah's coming (
Luke 1:76). His purpose was not to prepare the people for the acceptance of the message of the Messiah as believed. His was the signal, the '
sign', to Israel -- I am here, be prepared. The Messiah is on his 'way'.