Clan MacEacharn (Scottish Gaelic: Sìol Eachairn) were a group of families who occupied lands in the Kintyre, Islay, and Morvern regions of Scotland as well as island areas such as Mull and Tiree. They are traditionally known as one of the oldest Western Highland family names. The history of the Kintyre branch and its sub branches are well known, however the histories of the Islay and Morvern branches and the island branches is obscure.