Surname Blathnaid (Blathnaid 
) , worldwide, is a very rare last name. The cognomen Blathnaid is habitual in Northern Europe, particularly Ireland, where it is a rare surname. Much more prevalently, Blathnaid is the forename as well as the last name.
Cox, Carlin, Coffey, Clarke, Cullen, Bergin, Taylor, Trayer, Harney, Hughes, Whelan, Mcclean, Mckenna, Mcmahon, Prenter, Donovan, Griffin, Farrell, Quigley, Connolly, Cochrane, Cipriano, Choice, Sheedy, Martin, Quinn, Lee, Shea, Kerr, Ryan, Lyne, Hart, Ward, Mahon, Moore, Mealy, Macnamara, Smyth, Byrne, Kenny, Keogh, Riley, Doyle, Lynch, Nolan, Hynes, O'Dea, Woods, Burke, and Mcdermott