Question: Who is the maternal grandfather of Christina, Queen Of Sweden?
Sentence (from "Christina, Queen of Sweden"): Christina (18 December 1626 – 19 April 1689), the only surviving legitimate child of King Gustavus Adolphus of Sweden and his wife Maria Eleonora of Brandenburg, reigned as Queen of Sweden from 1632 until her abdication in 1654.
Relevant evidence: Yes