The Kennedy family just grew a bit bigger now that Caroline Kennedy’s daughter Tatiana Schlossberg, 31, had her first baby recently. It was Caroline’s only son, Jack Schlossberg, 29, who announced the exciting news on The Today Show on Thursday.

Tatiana and husband George Moran are officially a family of three now that son Edwin has joined the family. But Jack has a few thoughts on his nephew’s name. “His name is Edwin, but I like to call him Jack,” he joked. Savannah Guthrie looked a bit confused, but Jack confirmed the baby is named Edwin, after his father Edwin Schlossberg. And of course, Caroline is “so into” being a grandmother since the newborn is the first grandchild in their immediate family. Edwin would have been former President John F. Kennedy and Jacqueline Kennedy Onassis’ first great-grandchild.