Extended spelling of Marian, reinforcing the association of the second element with Ann(e). It also represents a French assimilated form of Mariamne. Marianne is the name used for the symbolic figure of the French Republic.
Irish: Anglicized form of Gaelic Mac Dhuibhshíthe ‘son of Duibhshíth’, a personal name composed of the elements dubh ‘black’ + síth ‘peace’. According to Woulfe, this was originally a Scottish name (usually Anglicized there as McPhee), which was taken to Antrim in the 16th century.