Pup, whelp, or young dog
Cailean is a traditional Scottish Gaelic name that translates literally to 'pup' or 'whelp.' It has long been used as a term of endearment for a young boy or a youth. It is often considered the Scottish equivalent of the name Colin.
Fewer than 5 boys were named Cailean in 2025.
13th-century Scottish chief and progenitor of the Clan Campbell
Scottish professional footballer
US births per 5-year period, 1990–present (SSA data).
