Question: Who is Rikky Von Opel's paternal grandfather?
Sentence (from "Fritz von Opel"): Fritz Adam Hermann von Opel (4 May 1899 – 8 April 1971), known as Fritz Adam Hermann Opel until his father was ennobled in 1917, was the only son of Wilhelm von Opel and a grandson of Adam Opel, founder of the Opel company.
Relevant evidence: Yes