Guernsey

Channel Island, the name is Viking. The second element of the name is Old Norse ey "island" (compare Jersey); the first element uncertain, traditionally meaning "green," but perhaps rather representing a Viking personal name, such as Grani.

Like neighboring Jersey, its name also was taken as the word for a coarse, close-fitting vest of wool (1839), worn originally by seamen, and in Australia the word supplies many of the usages of jersey in U.S. As a type of cattle bred there, from 1784.