Likely a modern variant of Niall or Nolan
Nylan is a contemporary American name, most likely created as a blend of the Irish name Niall, meaning 'cloud' or 'champion', and the surname-turned-first-name Nolan. It follows the popular trend of adding a 'y' or 'an' suffix to established sounds. Because it is a modern creation, its specific etymology is less fixed than traditional names.
Less common today
Nylan isn't in the latest US Top 1000. It last peaked at #2,518 in 2024.
US births per 5-year period, 1990βpresent (SSA data).