Usually a girl's name, a pet form of Jessica, also recorded in Scotland from an early date as a pet form of Jean, although the derivation is not clear. The Gaelic form is Teasag. It is now quite often used in Scotland and elsewhere as a given name in its own right. As a boy's name it is a respelling of Jesse.
English: from Middle English buyscel, busshell, bysshell ‘bushel’, ‘measure of grain’ (Old French boissel, buissel, of Gaulish origin), hence a metonymic occupational name for a grain merchant or factor, one who measured grain. The name may also have been applied to a maker of vessels designed to hold or measure out a bushel.