When Ian Duncan was born on 19 March 1926, in Victoria, Australia, his father, Andrew Marshall Duncan, was 31 and his mother, Sarah Jane Hammond, was 39. He died on 18 December 2001, in Koroit, Victoria, Australia, at the age of 75, and was buried in Koroit, Victoria, Australia.
Scottish: from the Older Scots personal name Dunecan, itself from the traditional Irish royal name Donnchad(h), derived from donn ‘brown-haired’ + cath ‘battle’. Judging by the Scots form, the Scottish Gaelic intermediary seems to have been understood as containing ceann ‘head’, as if the whole name meant ‘brown head’; compare sense 2. In Ireland the name was Anglicized as Donagh or Donaghue. Compare Donahue .
Irish: used as an Anglicized equivalent of Gaelic Ó Duinnchinn ‘descendant of Donncheann’, a byname composed of the elements donn ‘brown-haired man’ or ‘chieftain’ + ceann ‘head’.
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