Who is the most famous person in Ireland why are they famous?

Bono is the most famous person in Ireland. He is an Irish singer, songwriter, and philanthropist. He is best known as the lead vocalist and main songwriter of the rock band U2. Bono has also been involved in various social and political causes, including poverty relief and debt cancellation for developing countries. He is a co-founder of the ONE Campaign and DATA, an advocacy and research organization focused on global poverty.