A surname. • An English surname originating as a patronymic of common usage in Wales and England. • An Irish surname originating as a patronymic, an adopted anglicization of Mac Uilliam (McWilliam). • A placename: • A number of places in the United States: • A city in Coconino County, Arizona; named for frontiersman Old Bill Williams. • A city in Colusa County, California; named for early resident W. H. Williams. • An unincorporated community in Modoc County, California. • An unincorporated community in Adams County, Indiana. • A census-designated place in Lawrence County, Indiana; named for postmaster Byrd E. Williams. • A minor city in Hamilton County, Iowa. • A township in Bay County, Michigan. • A minor city in Lake of the Woods County, Minnesota; named for early settlers William Mason and George Williams. • A township in Aitkin County, Minnesota. • A ghost town in Thayer County, Nebraska; named for the founders' son, William. • A census-designated place in Josephine County, Oregon; named for nearby Williams Creek, itself for Army Captain Robert Williams. • A township in Dauphin County, Pennsylvania. • A township in Northampton County, Pennsylvania. • A town in Colleton County, South Carolina. • A river in Oregon. • A river in Vermont; named for Puritan minister John Williams. • A river in West Virginia. • A place in Australia: • A river in New South Wales. • A town and local government area (the Shire of Williams) in the Wheatbelt region, Western Australia; named for the nearby Williams River. • A river in Western Australia; probably named for William IV of the United Kingdom.