Sir William Hewett (also Hewit, Huett, and Hewet; c. 1505 – 1567) was a prominent merchant of Tudor London, a founding member and later Master of the Worshipful Company of Clothworkers of London as incorporated in 1528, and the first of that Company to be Lord Mayor of London, which he became in the first year of the reign of Queen Elizabeth I. His career arched across the first four decades of the Company's history, and drew him inexorably, if sometimes reluctantly, into the great public affairs of the age.[1]