1) A kind of coarse narrow cloth, woven from long wool and usually ribbed. It is thought to derive from Kersey in Suffolk but that has not yet been proved (OED).
In 1348, John Marreys was appointed ulnager for life ‘of all kinds of cloth’ including kersies. Later examples are: 1458 unam virgatam de kersey nigri coloris, Manchester
1472 2 pec’ Kersayes, Hull
1535 Item, brode cloth and white narowe Karcy, Stillingfleet. Variant spellings are common from the fifteenth century and they are dealt with under ‘carsey’ and ‘garsey’.