The Duchess’s shield, from the Middleton Coat of Arms and granted to the family in 2011 ahead of Kate’s marriage, is shown on the right.

Prince William's version of his family's coat was given to him by Queen Elizabeth II on his 18th birthday, and the Middleton family received theirs before Kate married into the royal family in 2011.

Sophie, the Duchess of Edinburgh used the joint coat of arms she shares with Prince Edward in a letter after the crest on Meghan Markle and Prince Harry's new website sparked conversation.

It’s also known as deep-sea trevalla or trevally. Emu: a large flightless bird that, with the kangaroo, is one of the supporters of the Australian coat of arms.