Daily Monitor Saturday April 10 2021 In this file photo taken on March 13, 2015 Britain's Queen Elizabeth II (L) and Britain's Prince Philip, Duke of Edinburgh, leave St Paul's Cathedral in London on March 13, 2015, after attending a memorial service to mark the end of Britain's combat operations in Afghanistan. Photo | AFP Summary From His Royal Highness to royal knight, earl, duke, prince and baron, Philip’s 74-year marriage to Queen Elizabeth II earned him several titles. All, obviously, conferred by his wife the Queen. Advertisement By the time he died on April 9 aged 99, Britain’s Prince Philip, the Duke of Edinburgh, had chalked up virtually every prestigious title a member of the royal family can possibly acquire.