As it happened, Hugo Eugenio, legitimated after his father's death by Philip IV of Spain, died childless about the age of 29 in 1660, but he outlived his cousins Conn and Owen Roe O'Neill; four of the other descendants of Art mac Baron called themselves Earl of Tyrone, and claimed the colonelcy of the Tyrone regiment. The last succession was disputed: Art mac Baron's daughter married a grandson of Shane the Proud, and their son (another Conn O'Neill) claimed the King of Spain's recognition in 1682; but the Spanish court acknowledged another Eugenio, Art mac Baron's great-grandson, who died a minor in the 1690s.