EtymologyMac Íomhair is an Irish Gaelic surname meaning "son of Íomhar"—the equivalent of the Anglicized McIver. The personal name Íomhar itself derives from the Old Norse Ívarr, brought to Ireland by Scandinavian settlers during the Viking Age. The Norse name is composed of the elements ýr ("yew tree, bow") and herr ("army, warrior"), giving the meaning "bow warrior."Like many Irish patronymic surnames, Mac Íomhair originally indicated descent from a father named Íomhar, but it no longer necessarily reflects the bearer's paternal name. The variant Mag Íomhair also occurs, with the same underlying meaning.Notable BearersWhile specific notable individuals with the surname Mac Íomhair are not documented in the available sources, the name shares its roots with several prominent Scottish and Irish clans, such as the McIver and McKeever families. These names are cognate with the Scandinavian Iversen and Ivarsson, all ultimately deriving from the Old Norse personal name Ívarr.Cultural SignificanceThe surname reflects the profound influence of Norse culture on medieval Ireland and Scotland. The adoption of Ívarr by Gaelic speakers illustrates the integration of Viking settlers into the Celtic tribal system. The feminine forms of the name follow Gaelic grammatical rules: Nic Íomhair for an unmarried woman, and Bean Mhic Íomhair or Mhic Íomhair for a married woman. For the variant Mag Íomhair, the corresponding feminine forms are Nig Íomhair, Bean Mhig Íomhair, and Mhig Íomhair.Meaning: "son of Íomhar" (Irish Gaelic)Origin: Irish patronymic surnameRoot name: Íomhar, from Old Norse Ívarr ("bow warrior")Usage regions: IrelandAnglicized forms: McIver, MacIver, McKeever, Ivers