Pure or chaste
A modern American elaboration of the word 'chaste', likely influenced by the suffix '-lyn'. It carries the virtue-based meaning of purity and innocence, following the pattern of names like Jocelyn or Madelyn.
Less common today
Chastelyn isn't in the latest US Top 1000. It last peaked at #1,520 in 2009.
US births per 5-year period, 1990–present (SSA data).
