William Dennis "Billy" Williams (27 September 1905 — 8 March 1994) was a football. He was born in Leytonstone.
He became the youngest ever professional at 15 years of age, when in 1921 he signed for West Ham United from Fairbairn House. On 6 May 1922 making an appearance against Blackpool, at aged 16 years and 221 days, he became West Ham's yougest ever player; a record he still holds. The forward made 44 appearances in all competitions and scored 9 goals for West Ham before joining Chelsea in 1927.