Namesakes
Gustav II Adolf
(a.k.a. Gustavus) (m) 1594-1632 
Notable Military Figures
Swedish Kings and Queens 1611-1632
Gustav III
(a.k.a. Gustavus) (m) 1746-1792
Swedish Kings and Queens 1771-1792
Gustav Holst
(m) 1874-1934
Notable Musicians
Milton Sills
(middle name Gustavus) (m) 1882-1930
Notable Actors and Entertainers (actor)