Likely a modern variant of May or Miley
Meyli is a modern phonetic coinage, often used as a creative variation of the English name May or the Hawaiian name Mele. It may also be a stylized spelling of Miley, which gained popularity in the early 21st century. Its usage is primarily found in American and Latin American communities as a unique, melodic choice.
Less common today
Meyli isn't in the latest US Top 1000. It last peaked at #10,589 in 2009.
US births per 5-year period, 1990βpresent (SSA data).