Definition of "fanne"

Fannes — Pronounced the same as "fans," but used in writing to mean fem fans.

1944, John Bristol Speer, Fancyclopedia‎, Fannes, page 31

A little more than a week ago two fen and one fanne left for London as delegates to a big gathering formally billed as the Science Fiction Festival Convention but more intimately described as a fanference. […] Sad to relate, some of the European delegates were probably insurgents rather than true fen […] many of them would probably turn out to be real fen and fenne after all.

1951 May 21, Winthrop Sargeant, “Through the Interstellar Looking Glass”, in Life‎, volume 30, number 21, page 127

Dorothy lived in the middle of the great western plains, far away from any other fans. She was a very lonely little fanne, who could not afford to go to the annual World Conventions, and had been only to one Oklacon.

1959, Terry Carr, Ron Ellik (as Carl Brandon), “The Cyclone”, in The BNF of Iz‎, archived from the original on 21 July 2013