Question: Who is Archduke Stefan Of Austria's paternal grandfather?
Sentence (from "Charles, Margrave of Burgau"): Charles, Margrave of Burgau, also known as" Charles of Austria",( 22 November 1560 at Křivoklát Castle in Bohemia – 30 October 1618 in Überlingen), was the son of Archduke Ferdinand II of Austria and his first morganatic marriage to Philippine Welser.
Relevant evidence: No