Dreyfusard

Punch, like the majority of Englishmen, was strongly Dreyfusard.
Mr. Punch's History of Modern England Vol. IV of IV.|Charles L. Graves
General Andr was an ardent Dreyfusard, strongly opposed to clerical and reactionary influences in the army.
Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 7|Various
I was very glad to meet Colonel Picquard at a dinner in a Dreyfusard house.
The Sunny Side of Diplomatic Life, 1875-1912|Lillie DeHegermann-Lindencrone
The innocence of Dreyfus would be a crime, said a famous anti-Dreyfusard.
The Fruits of Victory|Norman Angell

At the Auteuil steeplechase in June the president was struck on the head with a cane by an anti-Dreyfusard.
Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 1|Various