The Pomeranian (often known as a Pom or Pom Pom) is a breed of dog of the Spitz type, named for the Pomerania region in Central Europe (today part of northern Poland and eastern Germany). Classed as a toy dog breed because of its small size, the Pomeranian is descended from the larger Spitz type dogs, specifically the German Spitz. It has been determined by the Fdration Cynologique Internationale to be part of the German Spitz breed, and in many countries, they are known as the Zwergspitz (Dwarf Spitz). The breed has been made popular by a number of royal owners since the 17th century. Queen Victoria owned a particularly small Pomeranian and consequently the smaller variety became universally popular. During Queen Victoria's lifetime alone, the size of the breed decreased by 50%. Overall, the Pomeranian is a sturdy, healthy dog. The most common health issue is Luxating patella. Tracheal collapse can also be an issue.