Elizabeth Susannah CHILD died in Bromley Kent 4 Nov 1903. I believe she was the eldest child and daughter of George CHILD and Elizabeth, née Clulow. At the time of her death she was in the care of her brother Septimus CHILD and family.
Nahneen Helen Yvonne CHILD married Claud Hayes at Notre Dame, Paris in 1914. This more than suggests that she was one of your side of the CHILD family. She may have had other names? Her Date of Birth was 24 July 1891.
I believe she had a sister who equally had an odd set of names Algorta Marjorie Blanche CHILD. She was born in 1888. She was also known as Diana. She married Sir Archie HAMILTON Bart. in 1906 at age 16 but left him two years later.
PLEASE Have a look at your records and see if there are any possible matches. Nahneen gave her daughter a clue to her mysterious background on her death bed but it has never been understood.