Question: Who is Princess Isabelle Of Orléans (1900–1983)'s paternal grandfather?
Sentence (from "Princess Anne, Duchess of Calabria"): Princess Anne of Bourbon- Two Sicilies, Dowager Duchess of Calabria(" née" Princess Anne d' Orléans; born 4 December 1938) is the widow of Infante Carlos, Duke of Calabria.
Relevant evidence: No