Question: Which dog breed has more derivative breeds from the original, German Spitz or Norfolk Spaniel?

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The American Eskimo Dog is a breed of companion dog originating in Germany.  The American Eskimo is a member of the Spitz family.  The breed's progenitors were German Spitz, but due to anti-German prejudice during the First World War, it was renamed "American Eskimo Dog".  Although modern American Eskimos have been exported as German Spitz Gross (or Mittel, depending on the dog's height), the breeds have diverged and the standards are significantly different.  In addition to serving as a watchdog and companion, the American Eskimo Dog also achieved a high degree of popularity in the United States in the 1930s and 1940s as a circus performer. The English Springer Spaniel is a breed of gun dog in the Spaniel family traditionally used for flushing and retrieving game.  It is an affectionate, excitable breed with a typical lifespan of twelve to fourteen years.  They are very similar to the Welsh Springer Spaniel and are descended from the Norfolk or Shropshire Spaniels of the mid-19th century; the breed has diverged into separate show and working lines.  The breed suffers from average health complaints.  The show-bred version of the breed has been linked to "rage syndrome", although the disorder is very rare.  It is closely related to the Welsh Springer Spaniel and very closely to the English Cocker Spaniel; less than a century ago, springers and cockers would come from the same litter.  The smaller "cockers" hunted woodcock while the larger littermates were used to flush, or "spring," game.  In 1902, The Kennel Club recognized the English Springer Spaniel as a distinct breed.  They are used as sniffer dogs on a widespread basis.  The term "Springer" comes from the historic hunting role, where the dog would flush (spring) birds into the air. The German Spitz Klein is a breed of dog of the German Spitz type.  They are usually classed as a toy or utility breed. The Picardy Spaniel is a breed of dog developed in France for use as a gundog.  It is related to the Blue Picardy Spaniel, and still has many similarities, but the Picardy Spaniel is the older of the two breeds.  It is thought to be one of the two oldest continental spaniel breeds and was favoured by the French nobility, remaining popular for hunting after the French Revolution due to its weather resistant coat that enabled it to hunt in a variety of conditions and terrain.  However its popularity waned following the influx of English hunting breeds in the early 20th century.  Slightly smaller than an English Setter but larger than most of its spaniel cousins, it has no major health issues although as with many breeds with pendulous ears, it can be prone to ear infections. The Welsh Springer Spaniel is a breed of dog and a member of the spaniel family.  Thought to be comparable to the old Land Spaniel, they are similar to the English Springer Spaniel and historically have been referred to as both the Welsh Spaniel and the Welsh Cocker Spaniel.  They were relatively unknown until a succession of victories in dog trials by the breed increased its popularity.  Following recognition by The Kennel Club in 1902, the breed gained the modern name of Welsh Springer Spaniel.  The breed's coat only comes in a single colour combination of white with red markings, usually in a piebald pattern.  Loyal and affectionate, they can become very attached to family members and are wary of strangers.  Health conditions are limited to those common among many breeds of dog, although they are affected more than average by hip dysplasia and some eye conditions.  They are a working dog, bred for hunting, and while not as rare as some varieties of spaniel, they are rarer than the more widely known English Springer Spaniel with which they are sometimes confused. The American Cocker Spaniel is a breed of sporting dog.  It is a spaniel type dog that is closely related to the English Cocker Spaniel; the two breeds diverged during the 20th century due to differing breed standards in America and the UK.  In the United States, the breed is usually called the Cocker Spaniel, while elsewhere in the world, it is called the American Cocker Spaniel in order to differentiate between it and its English cousin, which was already known as "Cocker Spaniel" before the American variety was created.  The word "cocker" is commonly held to stem from their use to hunt woodcock in England, while "spaniel" is thought to be derived from the type's origins in Spain. The Pomeranian (often known as a Pom or Pom Pom) is a breed of dog of the Spitz type that is named for the Pomerania region in Germany and Poland in Central Europe.  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 Fédération Cynologique Internationale to be part of the German Spitz breed; and in many countries, they are known as the Zwergspitz ("Dwarf-Spitz"). The King Charles Spaniel (also known as the English Toy Spaniel) is a small dog breed of the spaniel type.  In 1903, the Kennel Club combined four separate toy spaniel breeds under this single title.  The other varieties merged into this breed were the Blenheim, Ruby and Prince Charles Spaniels, each of which contributed one of the four colours available in the breed. The Norfolk Spaniel or Shropshire Spaniel is an extinct breed of dog since the early 20th century.  It was originally thought to have originated from the work of one of the Dukes of Norfolk, but this theory was disproven after being in doubt during the later part of the 19th century.  The term was used to designate springer type spaniels that were neither Sussex nor Clumber Spaniels, and attempts were made to use it to specify a breed that would later become known as the English Springer Spaniel. German Spitz is used to refer to both a breed of dog and category or type of dog.  Several modern breeds have been developed from the German Spitz, and are either registered as separate breeds or as varieties of German Spitz.  All the "German Spitz type" dogs are dogs of the Spitz type of German origin.  The Großspitz, Mittelspitz, and Kleinspitz breeds of "German Spitz type" are also called the German Spitz in English.

Supporting sentences:
German Spitz is used to refer to both a breed of dog and category or type of dog.  Several modern breeds have been developed from the German Spitz, and are either registered as separate breeds or as varieties of German Spitz.  The term was used to designate springer type spaniels that were neither Sussex nor Clumber Spaniels, and attempts were made to use it to specify a breed that would later become known as the English Springer Spaniel.