There are a few mentions on line (submitted family trees) for this line. They show father James as having died in 1880 and mother Elizabeth in 1913 - all of this can be double checked on
www.scotlandspeople.gov.uk/This possible census entry for 1891 but not sure where Elizabeth (could she be showing as Jane?) would have been or where the later children have come from if James is supposed to have died in 1880

:
Elizabeth Cowe 36 b. C'Path, Berwickshire
Thomas Aitken Cowe 16 b. Oldhamstocks, Haddington
William Aitken Cowe 11 b. C'Path, Berwickshire
Jane Cowe 9 b. Oldhamstocks, Haddington
John Cowe 7 b.Dunbar, Haddington
Address: Thurston Smithy Cottages, Innerwick, East Lothian
Possible birth entry for son Thomas (if parents were not married perhaps) from IGI:
Thomas AITKEN b. 31 DEC 1874 in Oldhamstocks, East Lothian, Scotland
Mother Elizabeth AITKEN
Monica