Unknown; likely a modern invented name or variant.
Naidelin is a modern name with no established etymological root. It is most frequently used within Spanish-speaking communities in the United States and Latin America, likely created as a melodic combination of sounds or as a creative variant of names like Nayeli or Madelyn.
Less common today
Naidelin isn't in the latest US Top 1000. It last peaked at #2,496 in 2003.
US births per 5-year period, 1990βpresent (SSA data).