George V
As King during World War I, George and his wife visited the Western Front regularly to greet British and Commonwealth troops and also to raise morale amongst the troops. He changed the family name to "Windsor" to remove any association with a German heritage, because Germany was very unpopular at this time. Among other things, he started the "Royal Christmas Broadcast" tradition. He was known for being a stamp collector. His sons Edward and George would later become kings of the United Kingdom and British Empire.