Sir Robert Hughes Williams, CBE, FRS, FLSW, HonFInstP (born 22 December 1941), commonly known as Robin Williams, is a Welsh physicist and academic, specialising in solid state physics and semiconductors. He was Vice-Chancellor of University of Wales, Swansea from 1994 to 2003. He had taught at the New University of Ulster and University of Wales, College of Cardiff, before joining Swansea.