WATCH: Prince Harry and Meghan Markle Reveal Queen Elizabeth’s Nicknames

To the world, Queen Elizabeth has many names. Born Elizabeth Alexandra Mary Windsor, we know the long-reigning monarch as Queen Elizabeth II, Her Majesty, and even as Elizabeth R. But, thanks to a recent Instagram post (below) from Prince Harry and Meghan Markle, we now know that those are just a fraction of the names the beloved royal responds to.

For her 93rd birthday over the weekend, the Duke and Duchess of Sussex honored the family matriarch with a charmingly personal message on social media. Alongside the post, which included a series of photos taken throughout the Queen’s life, the couple revealed that they have several nicknames for the monarch, including “Your Majesty,” “Ma’am” and “Granny.”

“Happy Birthday Your Majesty, Ma’am, Granny,” the caption reads. “Wishing you the most wonderful day! Harry & Meghan”

We should add that Markle, whose first baby is due any day now, was noticeably absent from the royal family’s combined Easter-birthday festivities on Sunday. Fingers crossed for a baby announcement this week!