Question: Who is Peter August, Duke Of Schleswig-Holstein-Sonderburg-Beck's paternal grandfather?
Sentence (from "Frederick Louis, Duke of Schleswig-Holstein-Sonderburg-Beck"): He was the son of August Philipp, Duke of Schleswig-Holstein-Sonderburg-Beck and Countess Marie Sibylle of Nassau-Saarbrücken.
Relevant evidence: Yes