Rosicrucians have been known to conjure various "alien spirits".
I have spotted this today:
"Angelo Roncalli took the name of John XXIII, last used (1410-15) by antipope Baldassare Cossa, possibly because, according to Pier Carpi (
Les Properties de Jean XXIII, 1976), under that name he joined the masonic Rosicrucians in Turkey (1935)"
From: The Enemy is Here by Hutton Gibson.p.89