Kathleen Rochard Simon, Viscountess Simon, DBE was an Anglo-Irish anti-slavery activist. She was inspired to research slavery after living in Tennessee with her first husband, and she joined the abolitionist movement when she returned to London after his death. With her second husband, Sir John Simon, she campaigned against all forms of servitude. Travelling and speaking throughout her life, she was renowned for her commitment to ending slavery and racial discrimination, and was appointed Dame Commander of the Order of the British Empire.

Anti-Slavery International, founded as the British and Foreign Anti-Slavery Society in 1839, is an international non-governmental organisation, registered charity and advocacy group, based in the United Kingdom. It is the world's oldest international human rights organisation, and works exclusively against slavery and related abuses.