I am trying to find the siblings of Arthur Ronald Hill born 18 September or December in 1911 in Cardiff. His father was supposedly named Mark Hills and mother was supposedly named Jeanne (Jean, Jeanie, Jane, Ginny, Ginnie?..) Donald. I have no birth dates for Mark or Jeanne as that is what I am trying to research also. They had around 5-11 children, 3 being named Arthur Ronald Hill, John K Hill and Constance M Hill. Any information would be highly thankful!!