Norman Houstoun O'Neill (born 1875 in London, England; died 1934) was a notable British composer and pianist, primarily recognized for his contributions to the early 20th-century music scene. His genre spanned classical and light music, with a particular emphasis on piano compositions and songs. O'Neill's notable works include the orchestral suite "A London Symphony" and various piano pieces that showcased his lyrical style and innovative harmonies. He was also known for his contributions to the British theatre, composing music for several plays and musicals, which helped shape the sound of British musical theatre during that era. In addition to his compositions, O'Neill was a respected educator and served as a professor at the Royal Academy of Music. His impact on music lies in his ability to blend traditional classical forms with more contemporary influences, making his works accessible to a broader audience. O'Neill's legacy is reflected in his role in the development of British light music and his influence on subsequent generations of composers in the UK.