Talk:Vivian/@comment-73.49.74.214-20140522100148/@comment-5674726-20140524192755

Historically, the title Princess wasn't always used for the daughter of a monarch, and some of them were styled Lady. I think that it wasn't until the reign of George I that the daughters of a British sovereign were automatically styled Princess.

In Merlin, the two princesses we encounter, Elena and Mithian, are their fathers' heirs so maybe Vivian is Lady Vivian because she is not her father's heir.