In my county, as well as in many parts of England, the popular name is "foumart," which is said to be derived from "foul marten.".    From Wordnik.com.  [Natural History of the Mammalia of India and Ceylon] Reference

As they threaded the thicket of hazel, at some distance from the pool, one of the salmon-fishers declared, that from a plot of white-thorn and bramble-bushes he had seen the eyes of a foumart or polecat glare out upon him; and in a low voice, directing the attention of a comrade to the spot, they both imagined they could detect the figure of a man crouching among the trailing shrubs.    From Wordnik.com.  [The International Monthly Magazine, Volume 1, No. 1, August 1850 of Literature, Science and Art.] Reference

A foumart was caught in the back kitchen; you may perhaps know it better by the name of polecat.    From Wordnik.com.  [Heads and Tales : or, Anecdotes and Stories of Quadrupeds and Other Beasts, Chiefly Connected with Incidents in the Histories of More or Less Distinguished Men.] Reference

Measter, too -- I could a-bear a good deal, but measter cuts through the stable-yard, and past me, wi'out a word, as if I was poison, or a stinking foumart.    From Wordnik.com.  [A Dark Night's Work] Reference

In niches all around the sidewalls were couches covered with hare, rabbit, foumart, and fox's skins -- furnished by these animals slain by us in the woods and among the rocks of that sylvan and moorland parish -- the regal Torus alone being spread with the dun-deer's hide from.    From Wordnik.com.  [Recreations of Christopher North, Volume 2] Reference

"I'm well off the ridge," he muttered; "they could have marked me down like a foumart as I ran.    From Wordnik.com.  [Bog-Myrtle and Peat Tales Chiefly of Galloway Gathered from the Years 1889 to 1895] Reference

And the foumart lay his crawin!.    From Wordnik.com.  [The Complete Works of Robert Burns: Containing his Poems, Songs, and Correspondence. With a New Life of the Poet, and Notices, Critical and Biographical by Allan Cunningham] Reference

The corbies ken the shape of his shoulders, as craftily he threads the wood; and let them build their domicile as high as the swinging twigs will bear its weight, agile as squirrel, and as foumart ferocious, up speels, by the height undizzied, the dreadless Dominie; and should there be fledged or puddock-haired young ones among the wool, whirling with guttural cawings down a hundred feet descent, on the hard rooty ground floor from which springs pine, oak, or ash, driven out is the life, with.    From Wordnik.com.  [Recreations of Christopher North, Volume 2] Reference