Namesakes
Jet Black
(a.k.a. Duffy) (m) 1938-2022 
Notable Musicians
A. S. Byatt
(a.k.a. Duffy) (f) 1936-
Notable Writers
Duffy
(f) 1984-
Notable Musicians
Hugh Duffy
(m) 1866-1954
Hall-of-Famers 1945 (baseball)
Julia Duffy
(f) 1951-
Notable Actors and Entertainers (actor)
Keith Duffy
(m) 1974-
Notable Musicians
Patrick Duffy
(m) 1949-
Notable Actors and Entertainers (actor)
Shane Duffy
(m) 1992-
Notable Athletes (soccer)