Sark

Sark is part of the English Channel Islands off the coast of Normandy, France. It is a royal fief, part of the Bailiwick of Guernsey, and has its own set of laws based on Norman law, its own parliament, and exchequer.

Source: tatoeba (12121532)

I have often been amused by travellers pointing out, first the Eden, just north of the station, and then the Esk, which young Lochinvar swam, as the Border; the real boundary is, of course, the little river Sark, just south of the Caledonian station at Gretna; […].

Source: wiktionary

The next thing the watchers saw was the laird struggling up the far bank and casting his coat from him, so that he rode in his sark.

Source: wiktionary

Then lorek's rear claws dug into the links of Iofur's chain-mail sark and ripped downward. The whole front came away, and Iofur lurched sideways to look at the damage, leaving lorek to scramble upright again.

Source: wiktionary