Maldwyn Leslie Williams (9 September 1886 – 3 March 1917), known as "Mal" as a VFL footballer, mostly known as "Les" — and sometimes as "Billy" (from "Williams") — was an Australian rules footballer who played with University in the Victorian Football League.
A graduate (M.B.B.S.) of Melbourne University, Lieutenant-Colonel Williams, serving as a medical officer in the First AIF, died as a result of wounds received in action, in France.