First name content excerpted from The Complete Idiot's Guide to 30,000 Baby Names © 2005 by Marcia Layton Turner. Buy this book online or call 1-800-253-6476.
Last name content copyright © 2006 Patrick Hanks.
Last name origin & meaning:
Scottish and northern Irish: Anglicized form of Gaelic Mac Dhuibhshíthe ‘son of Duibhshíth’, a personal name composed of the elements dubh ‘black’ + síth ‘peace’. Compare Duffy.
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