William Ian Lewis (29 September 1935 – 20 November 2004), usually known by his middle name, was an Irish cricketer. A right-handed batsman, he played twenty times for the Ireland cricket team between 1955 and 1973 including five first-class matches. He was born and died in Dublin, Ireland. His son, Alan, and granddaughters, Robyn and Gaby Lewis, also played cricket for Ireland.