Madame Yevonde was the professional name of photographer Yevonde Cumbers.
Biography on British Council website:
Writer, artist and dancer Doris Louise Cleghorn Church / c.1915
Matte collodion printing-out paper print / National Portrait Gallery, London, UK
Motor-racing driver and aviator Jill Scott / Photographed 1938
Modern Vivex colour print, 1990 / National Portrait Gallery, London, UK
Madame Yevonde, NPG collection: https://www.npg.org.uk/collections/search/person/mp06547