what is the origin of the name isla
Isla (given name) The name in its original form was Ilay or Islay (e.g. Ilay Campbell), and it was a masculine given name, and was rare among women. Today Isla is regarded as a distinctly female name and Islay a rare male name. Other forms of the girls' name derived from alternate historical spellings of the Scottish island's name include Ile and Ila.
Clan Duncan (Dunchad) Duncan, originally a forename[2] is one of the earliest names in Scotland – and originates from the Dalriadan Celtic Celtic Scotii (Scots) from Ireland who colonised the south west of Scotland from about the 4th century AD. Dúnchad (Duncan mac Conaing) co-ruled Dalriada with Conall II (c.650 - 654).[3]