Virginia Prince is sometimes given credit for coining all variations/meanings of “transgender” because she wrote the term “transgenderal” once in 1969… but she never again used the term. It seems that it isn’t until 1980 that the term reappears in print:
It should be noted that “genderal” is a term that’s fallen out of common usage. Here are some of the contexts that the term “genderal” was used…
“Surely it is obvious by now that both men and women are equally enslaved by the Procrustean bed of genderal stereotyping.”
– Images of women in fiction: feminist perspectives, 1973, p 129
“Readings other than those mentioned that may be of interest and include: Patrick W. Conover, ‘An Analysis of Communes and International Communities with Particular Attention to Sexual and Genderal Relations,'”
– Understanding social research: an introduction, 1978, page 163
… oedipal conflict, but instead acquire a ‘core gender identity’ as females, and eventually grow up as transsexuals.” (Choice) Chapter bibliographies. Index. “[Stoller] explains genderal nonconformity In a neo-Freudian medical model.
– BRD: Volume 72, 1976, page 1157