No, Robbie Keane and Roy Keane are not brothers, despite the fact that they share a last name and are both footballers from the Republic of Ireland. According to the Daily Mail, it is often incorrectly assumed that they are related.
Robbie Keane's parents are Robert and Anne Keane. He was born in South Dublin on July 8, 1980. Roy Keane's parents are Maurice and Marie. He was born in Cork, Ireland, on Aug. 10, 1971. While Robbie Keane is not related to Roy, he is the second cousin once-removed of another famous individual: the singer Morrissey. Morrissey's father and Robbie Keane's grandfather were cousins.