Mary Elizabeth Ellis

Mary Elizabeth Ellis (1881–1974), often known as Mrs Gwilym Davies, was a Welsh peace activist. She was among the first women to hold professional positions of relatively high status in the field of education administration and governance in Wales. She was involved in educational and cultural organizations or movements, including, Bangor University the women's section of the Welsh League of Nations Union and Urdd Gobaith Cymru.

Mary Ellis was a prominent member of the delegation that travelled to the United States to present the to American women in 1924. In the context of the time, this was significant in the early years of the networks of the educated and professional class of women. In New York she met with dignitaries such as Eleanor Roosevelt and Carrie Chapman Catt.

Ellis was the second woman to have been appointed an Inspector of Schools in Wales. Her husband Gwilym Davies was a well-known figure in the League of Nations and founded the Message of Peace and Good Will which later became the annual Urdd Peace and Goodwill Message. They lived in Aberystwyth.