Namesakes
Fictional Characters from Books:
1 character
Ruby Gillis 1908 Anne of Green Gables 
Fictional Characters from Movies:
2 characters
Joe Gillis 1950 Sunset Boulevard
Ada Gillis 1961 Ada
Notable Musicians:
1 musician
Jack White (a.k.a. Gillis) 1975-
Olympic Medalists:
1 silver
(silver) Duncan Gillis 1912 hammer throw