Percy seems to have been the son of Ruth out of wedlock. According to the 1901 England census he was the son of James and Mary Ann Norman and in any case lived in their household, but since they were both aged 70 and he at that time was aged 3, it is clear that in any case Mary Ann cannot have been the mother. Ruth is listed as their daughter, aged 25 which is possible though perhaps also open to doubt. Aged 13, Percy is listed in the 1911 census as the stepson of Ruth's (then) husband Alfred Giddens, suggesting he was adopted by Alfred being the natural son of Ruth.
Percy served as a private in France in WW1 as part of the Cambridgeshire Regiment and was wounded during the Schwaben Redoubt offensive during the Battle of the Somme in 1916.
According to the source cited on ancestry.com, he died in Jonchery-sur-Vesle, near Reims, France, just before the outbreak of WW2. That source has a photograph of him. The village houses a WW1 British military cemetery, but he is not listed as buried there (https://www.cwgc.org/find/find-war-dead/results/?cemetery=JONCHERY-SUR-VESLE+BRITISH+CEMETERY&tab=wardead&casualtypagenumber=6).
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