Nialla

Rare and rhythmical with a familiar look about it, Nialla is a feminine form of masculine Niall. It may appeal to those wanting to honor a Neil, a Neal, or a Niall itself, or to those looking for alternatives to Nola, Nyla, or Noella.

Possibly meaning "cloud", other sources suggest it means "champion" or "hero".

Pronounced nee-AHL-uh.