Question: Who is Prince Karl Anton August Of Schleswig-Holstein-Sonderburg-Beck's paternal grandfather?
Sentence (from "Peter August, Duke of Schleswig-Holstein-Sonderburg-Beck"): Peter August Friedrich, Duke of Schleswig-Holstein-Sonderburg-Beck (7 December 1697 – 22 March 1775) was a Duke of Schleswig-Holstein-Sonderburg-Beck.
Relevant evidence: No