Duke was the title held by Prince Xavier in Parma. He was a member of the Bourbon-Parma family, a branch of the House of Bourbon that ruled the Duchy of Parma from 1748 to 1859. Prince Xavier was the second son of Duke Robert I and Princess Maria Pia of Bourbon-Two Sicilies. He was born in Parma in 1889 and died in Nice, France, in 1977.
Prince Xavier, Hereditary Duke of Parma Quiz: How Much Do You Really Know About Prince Xavier, Hereditary Duke of Parma?