William and Catherine (Kate) are the Williams family now or if you mean queen Elizabeth's family it is called Windsor
Princess Anne Princess Margaret Prince Andrew Prince Charles
Princess Anne Prince Andrew Prince Charles
Yes HRH Prince Andrew, Duje of York was in attendance.
A female prince; a woman having sovereign power, or the rank of a prince., The daughter of a sovereign; a female member of a royal family., The consort of a prince; as, the princess of Wales.
Yes because she is now part of the royal family and now since she is the bride of prince William she is princess.
Queen Elizabeth II is Head of State. Her husband is Prince Phillip and they have four children - Prince Charles, Princess Anne, Prince Andrew and Prince Edward. When Queen Elizabeth dies, her eldest son Prince Charles, will become King.
Prince Felipe ,Princess Cristina, Queen Sofia, Princess Elena and Juan Carlos
Her husband is Prince Philip Duke of Edinburgh. Her children are, Charles Prince of Wales, Anne The Princess Royal, Andrew Duke of York, and Edward Earl of Wessex. Her grandchildren are, Prince William of Wales, Prince Henry of Wales, Miss Zara Phillips, Mr Peter Phillips, Princess Beatrice of York, Princess Eugenie of York, Lord James Windsor and Lady Louise Windsor.
if you get married to a prince/princess you are then part of it
Prince Felipe ,Princess Cristina, Queen Sofia, Princess Elena and Juan Carlos
James II, his brother (Charles had no legitimate children).