Question: Who was the reigning monarch on christmas day 1949?
Disambiguated questions and answers: question: Who was the reigning British monarch on Christmas Day, 1949?
Who was the reigning monarch in Norway on Christmas day, 1949?
Who was the reigning monarch of Norway on Christmas day, 1949?
answer: George VI
Juliana
Haakon VII
Natural Questions answer: George VI (from the Wikipedia article "Regnal years of English monarchs")