At the pool; from the peaked hill
Copelin is likely a variant of the English surname Copeland or the Old English name Copland. It typically refers to someone who lived by a 'bought land' or a 'peaked hill,' though some etymologies link it to a 'pool' or 'pond.'
Less common today
Copelin isn't in the latest US Top 1000. It last peaked at #7,651 in 2024.
US births per 5-year period, 1990βpresent (SSA data).