The fifteen most numerous surnames in Co. Kildare based on the Irish Genealogical Project database compiled at Kildare County Library are:
Brennan, Byrne, Connor, Dowling, Doyle, Dunne, Farrell, Kavanagh, Kelly, Lawler, Moore, Murphy, Neill, Nolan and Walsh, Many of these names rank among the most common in Ireland in general.
Source:
IrishGen.com Broken Link