What does Duffy mean?
Duffy /duf-fy/ [2 sylls.] as a boys' name is of Gaelic origin, and the name Duffy means "swarthy". Duffy is a version of Duff (Gaelic): from the Gaelic "dubh". Defay is a common surname.
How popular is Duffy?
Duffy is an uncommon given name for males but a very popular last name for both adults and children (#827 out of 150436, Top 1%). (2000 U.S. Census)
Charted below is the baby name popularity of Duffy for boys. Duffy has not made it into the list so far. (Top 1000 Baby Names Statistics, 2014)
Duffy is alike in pronunciation to Daffy. Like Duffy, this name is not commonly used.