Dear Duncan,
Found your posting today and I have found my Kerr on your 1841 list.

Gateside Beith 1841.
James Kerr,age 40,Ag Lab.
Margaret kerr,age 35 ( ms;Barr).
Robert Kerr age 12,( did not know of him).
Barbara Kerr age 10,( she marrages a James Telford 1854).
James Kerr age 8,
Jean Kerr age 6,
John Kerr age 4.
Mary Kerr age 2 ( my gg grand mother, she marriage William Kirkwood 31 dec 1961).

There is also Janet Kerr born in 1842,she marriaged David Patton,
Thank you so much.

Do you have any census lists for Kirkwood.

Thomas Kirkwood born 1813 Dalry.father William ,mother Margaret Robertson.
Jean Kirkwood (ms;Campbell)father JohnCampbell,mother Janet Martin)
Jean Kirkwood

Thank you

Theresa