Things I find interesting about British Royal Family names:
George - from the German Hanovers, the anglicized version of Georg. It is interesting to me that George entered the BRF by way of the Hanovers since George is the Patron Saint of England. I can't rule out that George is a middle name of a previous British royal or the first name of a not well known royal.
Louis - I find this interesting because George I was born Georg Ludvig and then was re-named George Louis in Great Britain, so the anglicized version of Ludvig sounds very French to me.
Victoria - I think that most modern royals named Victoria / Viktoria link back to Queen Victoria or one of her descendants. Victoria was named Alexandrina Victoria at birth, Victoria comes from her German princess mother who, if I am understanding correctly, went by Princess Victoire but when she married into the BRF her name was anglicized to Victoria.