Mac Amhalghaidh variant forms of the name. A modern variant is Mac Amhalaí. Another is Mac Amhalaidh. Another variant is Mac Amhalghadha. Variant forms of "Mac Amhalghaidh" and "Mac Amhalghadha" include Mag Amhalghaidh and Mag Amhalghadha. "Mac Amhalghaidh" translates into English as "son of "Amhalghaidh"", or "son of "Amhalghadh"". The surname originated as a patronym, however it no longer refers to the actual name of the bearer's father. The personal name "Amhalghaidh", also spelt "Amhalghadh", is an old Gaelic name, and is of uncertain origin and meaning. "Mac Amhalghaidh" is a masculine surname. The form of this surname for unmarried females is
Mac Amhalghaidh "Nic Amhalghaidh". This feminine surname is actually a contracted form of "iníon Mhic Amhalghaidh", which translates into English as "daughter of "Mac Amhalghaidh"". The form of the surname for married females is "Bean Mhic Amhalghaidh", which translates into English as "wife of "Mac Amhalghaidh""; this feminine surname can also be represented in the contracted form "Mhic Amhalghaidh". A cognate of the Irish "Mac Amhalghaidh" is the Scottish Gaelic "MacAmhalghaidh". The feminine form of this Scottish Gaelic surname is "NicAmhalghaidh". This feminine name is composed of the prefix "Nic-", which is an abbreviated form of the Scottish Gaelic "nighean mhic" or