Think Aunty Sos' real name was Cecile.
Found following:
Ellen Gertrude born 29 April 1867 to George Cheverton, Homeopathic Chemist, High Street Tonbridge Wells and Harriet Cheverton formerly Hebber/Webber ??
1894 Marriage at Congregational Church Lewisham High Road district of Greenwich (Page 45) Col 90
4 April 1894 between
George Paul Mollard Age 24 Bachelor,Brokers Manager, 9 Wickham Road, Brackley
son of Louis Marc Mollard , Commission Agent
to
Ellen Gertrude Cheverton Age 26, Spinster, 24 Wickham Road Brackley,
daughter of George Cheverton, Chemist
in the presence of
A Mollard
L B d'Ivernois
B Abalone Cheverton
Mabel E Cheverton
Ettie Cheverton
Witness by registrar on 25 April 1895
Also
A Swiss marriage certificate for the above
Louis Marc Mollard was son of Hugues Joseph and Felia Marie-Louis Mollard from Neuchatel, Geneva
Louis married Augusta d'Ivernois daughter of Guillaume-Auguste and Dardel Marianne-Uranie
I have included the latter info because there are so many similar names on both sides due to cousins etc