Here are some of Ireland's most famous sporting cousins and relatives. RecommendedInevitably, there are some famous sets of Irish sporting cousins. Here are some of the best famous Irish relatives. 10 famous Irish sporting cousinsHere is our list of the most famous Irish sporting cousins and relativesRobbie Keane and Jason ByrneThe premiere Irish sporting cousin combo. Ciarán Kilkenny and lots of Irish sporting personalitiesNo Irish athlete boasts the sporting family ties of Dublin footballer Ciarán Kilkenny.