Is this the Peter Quigley listed at Drummond in the Primary Valuation of Ireland (GV) surveyed in 1860? Drummond is a townland not a town which is usually no more than the size of a village, thus it is to be assumed that much of the population were intermarried. My Keenan ancestors came to Co Durham from the parish of Inniskeen during the Famine. My grandfather, Patrick Keenan had an uncle called John Malone who also came to Co Durham and I have traced his family back to Drummond so I believe that is where my Keenans originated or at least close to there. John Malone spent some time back in Drummond in the 1870's and had at least two children born there. In 1875 when James Malone was baptised his sponsors were Patrick and Bridget Quigley --- any connection.