Modern invented name, likely a combination of Jay and Lynn.
Jeilyn is a modern American coinage, following the popular trend of combining established phonetic elements like the prefix 'Jay' and the suffix 'lyn'. It likely draws inspiration from names like Jalen or Kaylyn, offering a unique sound while remaining familiar to English speakers.
Less common today
Jeilyn isn't in the latest US Top 1000. It last peaked at #5,573 in 2014.
US births per 5-year period, 1990βpresent (SSA data).