 The given name "Alasdar" is an Irish form of the English "Alexander".The form of this Irish surname for unmarried females is "Nic Alasdair"; this name is actually a contracted form of "Iníon Mhic Alasdair", which translates into English as "daughter of "Mac Alasdair"".The form of "Mac Alasdair" for married females is "Bean Mhic Alasdair", which translates into English as "wife of "Mac Alasdair""; this surname can also be represented in the contracted form "Mhic Alasdair".