Cardi B's baby boy finally has a name the public knows. It's Grey.

The rapper marked her youngest child's first birthday with a batch of adorable photos. In some shots the little guy is rocking Rocky and Bullwinkle snapback hats. In others he's dressed up in overalls and tiny jackets.

A few pictures show him dressed as a doctor for Halloween with a "Grey's Anatomy" sign behind him. That costume turned out to be a clever hint.

The bracelet clue

Cardi also showed off bracelets with the names of her other three kids, Blossom, Kulture and Wave. A fourth bracelet and a matching necklace spell out "Grey."

Her birthday message settled any doubt. "Happy 1st birthday to Grey M.D🩶🩶🩶!!" she wrote.

"It's only been 1 year since meeting you but it feels like I've had you at my side forever. I carried you through one of the most uncertain high pressured times of my life but having you inside of me through it all gave me a extra strength," Cardi added.

She went on to say her son lights up every room with his smile and his laugh.

Mom and dad

Grey's father is NFL star Stefon Diggs. The two split in February, only a few months after their son arrived.

The romance may be over but this birthday post made one thing clear. Grey is surrounded by a whole lot of love from his mom.