shavian(n = noun.person) - an admirer of G. B. Shaw or his works;
is a kind of admirer, booster, champion, friend, protagonist, supporter

   shavian(a = adj.pert) - of or relating to George Bernard Shaw or his works;
Derived form noun shaw₄

shavian, adj. & n.
--adj. of or in the manner of G. B. Shaw, Irish-born dramatist d. 1950, or his ideas.
--n. an admirer of Shaw.

Etymology:
Shavius, Latinized form of Shaw