出典:Wiktionary
出典:『Wiktionary』 (2026/03/11 12:53 UTC 版)
From the Irish surname, from Ó Dubhthaigh (literally “descendant of Dubhthach”) and Mac Duibhshíthe (literally “son of Duibhshíth”), from dubh (“black”) + sìth (“peace”), comparable to the surname Duff.
Duffy (countable and uncountable, plural Duffys)
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