| Ailean | |
| Gender: | Masculine |
| Language: | Scottish Gaelic |
| Language origin: | Celtic |
| Meaning: | "rock" |
| Cognate: | Alan, Allan |
Ailean is a masculine given name in the Scottish Gaelic language. It is the Scottish Gaelic equivalent of the name Alan, Allan in English. Alan is considered to be a name of Celtic origin, possibility derived from a word meaning "rock"; it was introduced to England by Breton followers of William the Conqueror, in the 11th century.