A descendent from Thomas Law (son of GGF Thomas) and Christine Beall who married in New Zealand suggested that when they left Ireland after the potato famine and worked in the mines of Scotland, the Irish were not favoured and they may have taken their mother's surname, Knox, as it sounded more Irish? Results of my Ancestral DNA Ethnicity tests may also help to prove or disprove Irish origins. See more discussion of this theory in My Story > Mysteries, Motives and a Lawless Past (Theory Five).