Queen Elizabeth officially has a new great-grandchild! And this one has a very specific connection to Her Majesty—she was named after Gan-Gan’s famous nickname.

Over the weekend, Prince Harry and Meghan Markle revealed that they welcomed their second child, a baby girl named Lilibet “Lili” Diana Mountbatten-Windsor. The news was shared with a message from the royal couple that said, “The Duke and Duchess thank you for your warm wishes and prayers as they enjoy this special time as a family.”

The name Lilibet comes from Prince Harry’s grandmother, whose childhood nickname was (you guessed it) “Lilibet.” The queen was given the name because she couldn’t pronounce “Elizabeth” as a toddler, so her grandfather, King George V, imitated her own attempts and it stuck. In fact, the nickname was so popular that Prince Philip also affectionately used it for his wife as a pet name in private.