Modern invention, likely a variation of Nevaeh (Heaven spelled backward)
Levaeh is a contemporary American creation. It is most likely a phonetic variation or a blend of the popular name Nevaeh, which is 'Heaven' spelled backward, though it does not have a direct etymological root of its own.
Less common today
Levaeh isn't in the latest US Top 1000. It last peaked at #9,681 in 2012.
US births per 5-year period, 1990βpresent (SSA data).