Question: The great-great-grandfather of current head of the House of Hohenzollern held what official title?
Sentence (from "Prince Radu of Romania"): On 1 January 1999, he was given the name, not title of "Prince of Hohenzollern-Veringen" by Friedrich Wilhelm, Prince of Hohenzollern, the Head of the Sigmaringen branch of the Hohenzollern family.
Relevant evidence: No