F

From Fancyclopedia 2, ca. 1959

The pseudo middle initial of Speer. F is otherwise the most important initial in fandom, beginning as it does such words as fantasy, fan, FooFoo, future, fiction, feud -- well, read on and see for yourself.

From Fancyclopedia 1, ca. 1944

The pseudo middle initial of Speer, pronounced foo sometimes, maybe signifying "Fascist Speer", and maybe just intended to head people off before he created John A. Bristol‏‎; by analogy with Forry the "J", the "F" or "F" is a nickname for Juffus. F is otherwise the most important initial in fandom, beginning as it does such words as fantasy, fan, FooFoo, fonepole, fotografy, file, future, fiction, feuds, --well, read on and see for yourself.