I found my grandad on Wikitree, Harold Manners Williamson, 1898 to 1968. He married my grandma in 1919 who was Annie Hempstock, there is no information about her and her year of birth is not 1899. She was born on 1st January 1896 and died 5th December 1995. Both died at home at The Green, Finningley, near Doncaster.
Finningley was originally in North Nottinghamshire but is now South Yorkshire.
Annie had one brother as far as I'm aware, William (Billie) Hempstock. He lived at Warmsworth, Doncaster and had a daughter, Margaret, her husband was James and they had two children June and Richard I think.
Harold and Annie Williamson had 5 children I know of:
William
Charles
Harold
Lillian Ivy d. 2017
Margaret Annie d. 2010
The boys names above may be their middle names as my grandma had a habit of using middle names instead of their first name. Lillian was always called Ivy and Margaret was know as Annie.
William was married to Marie and they had one daughter Susan
Charles was married to Joyce and had one son Peter
Harold was married to Primrose who had two sons Mark and Colin
Ivy was married to Fred Hill who had two daughters Janet Hazel and Christine Audrey
Annie was married first to Keith Hirst who had 5 children, two boys and three girls. Trevor, Carol, Stephen, Jane and Emma.
Annie and Keith divorced and Annie married again to William Stuart Greig, they did not have any children.
The information on children is what I'm aware of as in living relatives. There could be others I was never aware of.
Kind Regards
Sources
England & Wales, Civil Registration Birth Index, 1837-1915:1898; Apr-May-Jun; Howden; 9d - 91 Ancestry Record 8912 #60892209