Champion or cloud
Neilan is a modern variant of the Gaelic name Neil. It likely derives from the Old Irish name Niall, which has been interpreted as meaning either 'champion' or 'cloud'.
Less common today
Neilan isn't in the latest US Top 1000. It last peaked at #6,106 in 2017.
US births per 5-year period, 1990βpresent (SSA data).