Eliana comes from the Hebrew Eliyana (אֱלִיעָנָה), composed of El (God) and anah (to answer) — meaning "my God has answered me" or "God has responded." It is a contemporary Hebrew name, used in Israel since the mid-twentieth century.
Eliana entered the U.S. top 1000 in the 1990s and has been rising steadily since. It now sits in the U.S. top 75.
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In Pythagorean numerology the letters of Eliana reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.