Dunn genealogists refer to him, as John Thomas Dunn.
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Irish: shortened Anglicized form of Gaelic Ó Duinn, Ó Doinn ‘descendant of Donn’, a byname meaning ‘brown-haired’ or ‘chieftain’. Compare Dunne . This name has sometimes been Anglicized as Brown .
English: nickname for a dark complexioned or swarthy man, from Middle English dun ‘dun, dark’ (Old English dunn ‘dull brown’).
Scottish: habitational name from Dun in Angus, named with Gaelic dùn ‘fort’. Compare Dun .
Dictionary of American Family Names © Patrick Hanks 2003, 2006.
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