The Collaborative International Dictionary
Schwenkfeldian
Schwenkfelder \Schwenk"feld`er\, Schwenkfeldian \Schwenk"feld`i*an\, n. A member of a religious sect founded by Kaspar von Schwenkfeld, a Silesian reformer who disagreed with Luther, especially on the deification of the body of Christ.
Douglas Harper's Etymology Dictionary
Schwenkfeldian
1560s, from Casper Schwenkfeld (1490-1561), Silesian Protestant mystic who founded the sect. Schwenkfelder is attested from 1882.