Hi, You didn't say how much infor you already had for this family, I checked the LDS for children of Thomas & Martha. It came up with 2. checked the 1851 census and found following:
William age 14 born Kirkcolm
Margaret age 11 born Kirkcolm
David age 9 born Kirkcolm
Ann age 5 born Kirkcolm
James age 2 born Kirkcolm
Thomas age 35 born Kirkcolm
Martha age 42 born Kirkcolm
also checked census for parents of Thomas (John & Margaret)atill living in Kirkcolm
John age 64 born Ireland
Margaret age 53 born Kirkcolm
Jean Moore Mcculloch age 30 born Kirkcolm - Married, Occupation: sewer of webs
David age 24 born Kirkcolm
John age 22 born Kirkcolm
James age 18 born Kirkcolm
Samuel age 16 born Kirkcolm
Andrew age 10 born Kirkcolm
As you see form above daughter Jean is married, looks like her husbands name is Moore
Hope this is of use to you.
Amanda