Prince William has not lost his title as prince. The duke of york still retains his title as prince Andrew however it is common for the queen to give other titles to royal members when they marry. When William married Catherine she automatically receives the title princess William but they will be officially known as the duke and duchess of Cambridge. Also a duke is higher than a prince.
He will still be Prince William.
The Duke of Cambridge, however, whereas Catherine is the Duchess of Cambridge, rather than a Princess, William retains his rank as Prince. He is therefore Prince William, Duke of Cambridge.
The term "prince" is used in the UK to refer to certain members of the royal family. William became a prince essentially by being born. Kate is a princess because she's married to a prince, but it's not customary to use that title unless the prince has no other title, which William does (see below). They are also the Duke and Duchess of Cambridge... William by a proclamation issued by his grandmother, Queen Elizabeth II, on the morning of his wedding day; Kate because she married the new Duke.
HE is now the Duke of Cambridge an kate is the Duchess of cambridge
It does not appear so, but I couldn't find absolute "proof". Checking this list of ancestors,(website below), reveals that her parents and all grandparents for whom there are records [back to great(x 4)] were married in Anglican churches. That suggests that if the Middletons are religious at all, they are probably Anglican.
Yes. Once she married Prince William, she became an HRH and was given the royal title Duchess of Cambridge.
She did, she bestowed the title of Prince on him when he was born.
No. That title has been given to his father, Prince Charles.
Prince William is now the Duke of Cambridge. He will not become the Prince of Wales until his father Prince Charles, the current Prince of Wales, becomes King. Even then, the title of Prince of Wales does not begin automatically. Prince William must have an investiture which bestows the title of Prince of Wales upon him. This answer was re-written by DieselEstate on 20th April 2012
No. That title has been given to his father, Prince Charles.
Because the Queen appointed this title to him