Amamda, I will do you a tree, that you will have as a guide.
Amanda.
Mother,.
Margaret Walker Cunningham Wallace.
Grandfather
James Wallace, b.1920?
Grandmother.
Margaret Cunningham. b 1920?
Greatgrandparents.
Andrew Cunningham b 1880 Ayrshire.[raised by his grandparents]
Mary Hardy Walker,b 1881? Married 1899, had Agnes 1900.Kilwinning. [I presume this is the family in the 1901 c]
[Marys parents will be James Walker and Agnes Wilson]
GGreatgrandparents.
Andrew Cunningham born 1856 Kilwinning,
Helen Linn.(or Isabella) [this is refering to the death cert, of her son 1950., but I feel this name re.Isabella. is an error.] [I have no info on her][but seems she gave her child to the grandparents/inlaw/. as we see Andrew jr in the household of Cunninghams 1881.]
GGGreatgrandparents. married 28 Oct 1854, Kilwinning.
Henry Cunningham. b Ayrshire. is in the 1881c &1891c Kilwinning. died 1893 Glasgow.
Mary Wales, in the 1881c Wife. also 1891c, died after her husband.
GGGGRandparents
Richard Cunningham b. abt 1813. died 1867. Kilwinning
Janet/Jean/Jeanie. Maxwell died after her husband.
GGGGGrandparents
Peter Cunningham [schoolmaster] died before 1867.
Sarah Brown.
Remember that when a woman marries, she takes his name,
In the 1901c Andrew Cunningham and Mary Cunningham.
with child Agnes.
Now you will have to buy certificates, and take the right path.
Usually, if a child is illegitimate,[ this may not be the case,here.]
You don't know who the father is, in this case, your Ggrand dad, seems to be raised by his grandparents. you are lucky, that this has happened. mind you,,, you should but the 1891c to see.
Sorry, I don't know what happened to Helen Linn.
See how you go. I am now going to post this on your query at Ayrshire.
kenjo. P.S. are you familar with the mormons site, familysearch?