William Charles Denis Browne (3 November 1888 – 4 June 1915), primarily known as Billy to family and as Denis to his friends, was a British composer, pianist, organist and music critic of the early 20th century. He and his close friend, poet Rupert Brooke, were commissioned into the Royal Naval Division together shortly after the outbreak of the First World War. Denis Browne was killed in action during the Gallipoli Campaign.