Khloe Kardashian and beau Tristan Thompson revealed their baby girl’s unique name via social media Monday: True Thompson. The name came as a surprise to fans online, but to the Kardashians it actually has a special meaning.

Khloe’s mom, Kris Jenner, explained in an Instagram post later that evening that the name True runs in the family.

“FUN FACT… my Grandfather’s name on my Dad’s side was True Otis Houghton….my Dad’s name was Robert True Houghton…so i am so excited Khloe named her daughter True!!!” Jenner wrote, sharing a photo of the dozens of pink balloons that filled what we can only assume is True’s new room.

Khloe, 33, shared a similar photo of a room adorned with pink toys, balloons and flowers hours earlier when she announced her little girl’s name. She also shared True’s measurements on her website, writing that she was born on April 12, weighing 6 lbs., 13 oz., and measuring 21 inches in length.

As of Tuesday morning, nearly 5 million people have liked Khloe’s Instagram photo and thousands of people commented, congratulating the couple.