Aghadowey
Even after so long, very remiss of me not to have thanked you for your contribution

After further research I found that Bocombra is located on the Old Lurgan Road and not very far from Lurgan. An aunt was able to confirm that William John Bell (the son), who was her grandfather, came from the Lurgan area, though she wasn't too sure of exact location, and I also found photographs of my mother, her sister, on holiday in 1947 in parts of Belfast very close to that area too.
William John Bell (the son) married a Lizzie Sewell in Glasgow in 1901. Their marriage record showed that Lizzies parents were a Joseph Sewell and Ann Creany, and that Lizzie's age gave an estimated birth year of circa 1880. The 1911 Census records for Glasgow also confirmed that William Bell and Lizzie Sewell were born in Ireland. Further research on the Family Search website produced a record of an Elizabeth Sewell born in late 1879 and her parents were given as Joseph Sewell and Ann Creany, and she was born in Lurgan.
So, aghadowey thanks for your lead. It opened up a new avenue for me and and regenerated my interest in this family branch. Thank you.
