What does Duffy mean?
(male) Dufeau, Dufry, ..
(female) Dufra, Dufri, ..
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. Demographics)
Duff is the only popular varying form of Duffy (not ranked). This relation of Duffy reached the height of its popularity in the 1950s (#1871). Below is a charted analysis of the popularity of Duffy and corresponding names. (Top Baby Names, 2014)