I suspect Violet Rose Young b.24th Oct 1901 appears as 9 yr old Cissie Davies in the 1911 census, the adopted daughter of James Rees Davies, Baptist Minister in Abercynon, Glamorgan.
On her marriage she is recorded as Violet Young Davis, her father as James Reese Davis, Baptist Minister. The mother's maiden names recorded on the births of her children are Young-Davies and Davies. Her death certificate records her forenames as Violet Rose. If her mother, Mary Ann Young, is who I now suspect she is, James Rees Davies would be Mary Ann's father's half brother and Mary Ann would be my grandmother's sister.
William Joseph Young seems to have wanderlust. Walsall, Rhondda Valley, Aston, Knighton, Rhondda Valley, Aston, Nottingham, New Tredegar, Salford and probably lots of places in between.
I need to order more documentation, births and the all important marriage certificate.
Presumably Mary Ann Young died between December 1901 and the remarriage of William Joseph Young in the first quarter of 1906. The death could be anywhere with the family moving about so much. Many thanks all for the help given, Ray