Question: Who is Peter August, Duke Of Schleswig-Holstein-Sonderburg-Beck's paternal grandfather?
Sentence (from "Peter August, Duke of Schleswig-Holstein-Sonderburg-Beck"): It had been inherited by his father's older brother, Duke August (1652–1689), and nephew Frederick William I (1682–1719), and was then sold by the latter's widow to Peter August's older brother, Duke Frederick William II (1687–1749), in 1732.
Relevant evidence: No