A fair number of Gaelic names were borrowed into English or Scots at different periods (e.g. Kenneth, Duncan, Donald, Malcolm, Calum, Lachlan, Alasdair, Iain, Eilidh), although it can sometimes be difficult to tell if the donor language was Irish or Scottish Gaelic (e.g. Deirdre, Rory, Kennedy, Bridget/Bride, Aiden). On occasion, the same name was borrowed more than once due to misinterpretation of Gaelic morphology. For example, the names Hamish and Mhairi are derived from Gaelic and but rather than borrowing the root forms, the English/Scots forms are based on the Gaelic vocative case forms and .