The name reached its all-time peak in 2012 with 7 births ranking #2721. FALLING Recent data shows the name is currently falling.
Collin is a spelling variant of Colin and shares its wider history. Parents often choose it simply for visual preference rather than because it signals a different origin or meaning.
The form Collin became especially familiar in modern English-speaking naming as variant spellings became more accepted. Its overall feel is steady, approachable, and quietly classic.