Royal watchers have been eagerly awaiting the official reveal of Prince William and Princess Kate's new puppy , and on May 1, they finally got their wish. The Prince and Princess of Wales gave a small glimpse of the dog in their 15th anniversary photo on April 29, but they surprised fans with a portrait of their brown cocker spaniel on social media Friday, sharing his name is Otto. "Welcome to the family, Otto! 1 today 🥳 🎂" the Instagram post read. In the photo, the dog's fur blows in the breeze as he sits in a field of flowers with a towering hill visible in the distance. Otto was born to the Wales family's dog, Orla , last May and made his first appearance in Prince William's birthday photo just about a month later. Princess Kate's brother, James, breeds dogs and gave Orla to William and Kate shortly before their first dog, Lupo, died in 2020 . Article continues below Otto sits behind Prince William's head in the prince and princess's 15th anniversary photo, shared on April 29.…