There is a possible marriage entry coming up on SP for her parents:1882 MCGUIRE JAMES DOCHERTY MARGARET ARDROSSAN OLD /AYR 576/01 0040It would mean that father James could have been married previously to account for the older children in the home in the 1891 Census. It would be worthwhile you looking at Marjory's birth cert. to confirm parents' names and date/place of their marriage. Alternatively, you could try to find her marriage or death cert, both which would confirm parents' names.Regards.MonicaADDED: Just a thought, with the years you have given in your first post, Marjory would have been 48-9 at the time of your mother's birth (1934), quite an age to still be giving birth.....any chance we have skipped out a generation here?
Joker found most of that info for me and informed me Marjory died 1970, her name is the only one on my mums birth and death cert. Many thanks for your help now have to figure out why and when my mums name got changed from Constance Doherty to Jean Lennox and why she gave her away