Question: Who is the maternal grandfather of Princess Maria Bona Of Savoy-Genoa?
Sentence (from "Princess Maria Adelaide of Savoy-Genoa"): Princess Adelaide of Savoy- Genoa( Maria Adelaide Vittoria Amelia; 25 April 1904 – 2 August 1979), was a daughter of Prince Thomas, Duke of Genoa and Princess Isabella of Bavaria.
Relevant evidence: No