Shevaun is a variant of the name Shavonne, which itself is an anglicized form of the Irish name Siobhán. Siobhán is a female name of Irish origin, derived from the Anglo-Norman Jehane and Jehanne, introduced into Ireland by the Anglo-Normans in the Middle Ages. The name means 'God is gracious' and is a cognate of the Welsh Siân and the English Joan.