Some recommendations for research that I recently found. I hope that they're new to you too, and that you'll find more information about your ancestors. "Surnames in County Down" by A. Hume which analyzes the 1852 voter survey list providing surname variations, frequency and locations of surnames, and other information. It includes a map that shows the location of many of the surnames. Surnames in the County Down; "The Ulster Journal of Archaeology" Volume 6, Archer and Sons, Belfast; 1858 pp. 76ff Lots of other interesting articles! The Origin and History of Irish names of places download from National Library of Scotland 1871 Census/Landowners Introduction Index The Belfast Newsletter Index 1737-1800 Cheers! Beth
There's a searchable version of The Belfast Newsletter Index 1737-1800 at https://www.ucs.louisiana.edu/cgi-bin/belfst/QueryForm1.cgi