found a reference to a article on the Colclough surname that might be worth trying to locate -
Journal of the Wexford Historical Society No. 10, 1984-1985,
Editor B. Colfer
(1) 'The Colclough Family' by Sean M. Cloney
The first member of this family to settle in Co. Wexford, in about 1540, was
Anthony Colclough, an officer in the army of Henry VII. Tintern Abbey was
their home for almost 450 years until 1960, when Miss L. M. B. Colclough
presented the building to the Irish Nation. It is currently being restored.
....
As well as the South Wexford / Tintern references I came across mentions of a few other locations in the county where there there were people with the surname.
extract from Irish Provincial Directory 1788 :
Corporation of Enniscorthy - Sir Vesey Colclough, portrieve.
two (of the 10) free Burgess of the town have the surname :
Adam Colclough, Esq. , Richard Colclough, Esq.
also found a reference, without a date, to a Mary Anne Colclough, daughter of Col. Dudley Colclough of Duffrey Hall, Co. Wexford.
Shane