Question: Who is Amadeo I Of Spain's paternal grandmother?
Sentence (from "Amadeo I of Spain"): The only King of Spain from the House of Savoy, he was the second son of King Vittorio Emanuele II of Italy and was known for most of his life as the Duke of Aosta, but was appointed King of Spain briefly, from 1870 to 1873.
Relevant evidence: Yes