Hi, 1st of all, I would look at Mackey/Marques/Marqui variants. If he was working for the Lord Lieutenent, he would have had to travel with him to Wexford +abroad. At that time convicts were being shiped from Ireland so the Lord Lieutenent would have business out there. nationalarchives.ie have info on convicts from 1791 to 1853. While working, your man wouldn't have taken his children with him. Maggie