Pure or chaste
Chastelin is a rare derivative of the French word 'chaste', ultimately rooted in the Latin 'castus'. It historically relates to the concept of purity and virtue. While it shares phonetic similarities with names like Chastity or Caitlin, it remains an extremely uncommon choice in modern English-speaking regions.
Less common today
Chastelin isn't in the latest US Top 1000. It last peaked at #4,481 in 2009.
US births per 5-year period, 1990βpresent (SSA data).