What is "macalasdair"

MacAlasdair is a masculine surname in Scottish Gaelic. The name translates into English as "son of Alasdair". The feminine form of the name is NicAlasdair, which translates into English as "daughter of Alasdair". These surnames originated as a patronyms, however they no longer refer to the actual name of the bearer's father. There are numerous Anglicised forms of MacAlasdair.

The Irish form of MacAlasdair is Mac Alasdair. Other similar Irish surnames are Mac Alastair, Mac Alastruim and Mac Alsandair. The feminine forms of these surnames for unmarried females are Nic Alasdair, Nic Alastair, Nic Alastruim, and Nic Alsandair. The feminine forms for married females are Bean Mhic Alasdair, Bean Mhic Alastair, Bean Mhic Alastruim, and Bean Mhic Alsandair; these names can also be contracted to Mhic Alasdair, Mhic Alastair, Mhic Alastruim, and Mhic Alsandair.

The Irish and Scottish Gaelic have many Anglicised forms. The Scottish Gaelic name has been borne by a notable Scottish clan, which was once seated on the south-west coast of Scotland. The Irish names have been borne by descendants of Scots who settled in the north of Ireland.