Namesakes
Hurricanes and Tropical Storms:
4 hurricanes
Hurricane Gladys 1955 
Hurricane Gladys 1964
Hurricane Gladys 1968
Hurricane Gladys 1975
Notable Actors and Entertainers:
6 actors
Gladys Cooper 1888-1971
Beatrice Lillie (a.k.a. Gladys) 1894-1989
Jean Arthur (a.k.a. Gladys) 1900-1991
Gladys George 1904-1954
Julie Gibson (a.k.a. Gladys) 1913-2019
Abby Dalton (a.k.a. Gladys) 1932-2020
Notable Musicians:
1 singer
Gladys Knight 1944-
Notable Writers:
1 author, 1 playwright/author
Mary Webb (a.k.a. Gladys) 1881-1927
Dodie Smith (a.k.a. Gladys) 1896-1990
Olympic Medalists:
1 bronze, 1 silver
(bronze) Gladys Carson 1924 swimming
(silver) Dorothy Manley (a.k.a. Gladys) 1948 100 m
Rock and Roll Hall-of-Famers:
1 musician
Gladys Knight 1996 Gladys Knight & the Pips
Saints:
1 saint
Saint Gladys ferch Brychan ?-523