question: Who is Mary Of Bourbon's paternal grandfather?
context: Title: Charles, Duke of Vendôme
  Passage: Charles de Bourbon (2 June 1489 – 25 March 1537) was a French "prince du sang" and military commander at the court of Francis I of France. He is notable as the paternal grandfather of King Henry IV of France.
  Title: Mary of Bourbon
  Passage: Mary of Bourbon or Marie de Bourbon (29 October 1515 – 28 September 1538) was a daughter of Charles, Duke of Vendôme, and Françoise d'Alençon, daughter of René, Duke of Alençon. Mary was the subject of marriage negotiations of James V of Scotland. He visited her in France, but subsequently married Madeleine of Valois. Mary died two years later.
answer: Francis
citations: Mary of Bourbon Charles, Duke of Vendôme