http://forebears.io/surnames/nicdomhnaill http://forebears.io/surnames/nicdomhnaill Any surname starting with "Nic" and ending with a Gaelic personal name is a

http://forebears.io/surnames/nicdomhnaill http://forebears.io/surnames/nicdomhnaill Any surname starting with "Nic" and ending with a Gaelic personal name is a woman's surname. Nic is a contraction of "nighean mhic" (Scottish) / "iníon mhic" (Irish), meaning "daughter of a son of," and is equivalent to Mac (son of) for girls and women. This particular name is the feminine Gaelic form of MacDomhnall (MacDonald in English), though it's misspelled. The initial consonant in Domhnall should be lenited to produce NicDhomhnaill, and if it's Scottish, there should be a grave over the "o."