Katerfelto was the name of a famous (possibly mythical) stallion

Stallion (horse)

A stallion is a male horse that has not been gelded .Stallions will follow the conformation and phenotype of their breed, but within that standard, the presence of hormones such as testosterone may give stallions a thicker, "cresty" neck, as well as a somewhat more muscular physique as compared to...

 that lived on Exmoor

Exmoor

Exmoor is an area of hilly open moorland in west Somerset and north Devon in South West England, named after the main river that flows out of the district, the River Exe. The moor has given its name to a National Park, which includes the Brendon Hills, the East Lyn Valley, the Vale of Porlock and ...

 (South West England

South West England

South West England is one of the regions of England defined by the Government of the United Kingdom for statistical and other purposes. It is the largest such region in area, covering and comprising Bristol, Gloucestershire, Somerset, Dorset, Wiltshire, Devon, Cornwall and the Isles of Scilly. ...

) in the early nineteenth century. Its name was possibly derived from the Prussian-born quack doctor Gustavus Katterfelto

Gustavus Katterfelto

Gustavus Katterfelto was a Prussian conjurer, scientific lecturer, and quack.Christian William Anthony Katterfelto arrived at Hull in September 1776 and traveled around Britain until his death in 1799. He performed in London from 1780-84...

, and it, in turn, lent its name to other horses bred on Exmoor in later years.

Als it was the title of a book, subtitled "A Story Of Exmoor", by George Whyte-Melville

George Whyte-Melville

George John Whyte-Melville was a Scottish novelist of the sporting-field and a poet.-Life and work:Born at Mount Melville, near St. Andrews. He achieved immediate success as a writer of fox-hunting stories with his first novel Digby Grand in 1854...

, first published 1875 by Chapman and Hall

Chapman and Hall

Chapman & Hall was a British publishing house in London, founded in the first half of the 19th century by Edward Chapman and William Hall. Upon Hall's death in 1847, Chapman's cousin Frederic Chapman became partner in the company, of which he became sole manager upon the retirement of Edward...

.