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Other Irish names to make the rich list are businessman Denis O'Brien.
Nine Irish people have been named in Forbe's Billionaire List 2022, with a combined worth of 54.8 billion dollars.
Palloniji Mistry, head of the Shapoorji Pallonji Construction Group in Mumbai, tops the Irish list with a net worth of 15 billion.
Limerick brothers and co-founders of Strype John and Patrick Collison are second, each worth 9.5 billion dollars.
Other Irish names to make the rich list are businessman Denis O'Brien - worth 3.8 billion - and Kingspan Group founder Eugene Murtagh, estimated to be worth 2.8 billion dollars.