Ronan Keating has shared the name he wants to go by instead of 'grandad' following the birth of his first grandchild. The Boyzone star, 47, spoke out on becoming a grandad for the first time on The One Show on 20 March, after his eldest son Jack, 24, who he shares with ex-wife Yvonne Connolly, announced the arrival of his first child on 9 March.