Freddie Linnett (69) owes her wealth to a portfolio of over 50 properties throughout Britain, as well as the building that houses the jewellery store, Boodles, on the corner of Dublin's Grafton Street.
Her uncles, Hughie and Paddy Murphy, emigrated from Armagh to Britain in 1945. She inherited a 32pc stake in the Leicester property group, Charles Street, which still today owns a swathe of properties in the English midlands city.
Chief executive Hugh and his wife Mary Murphy own around 49.2pc of the shares in the firm, with the extended family holding the remainder. It owns office blocks, warehouses, industrial estates, residential property and shopping centres throughout the UK, as well as two valuable London office blocks in Mayfair and Pimlico.
Two new hotels in Leicester, as well as an office block, new public square and regeneration of the former Leicester Central railway station are due to be completed by the firm later this year.
The most recent accounts for 2017 show that after writedowns and a loss on the sale of a property, the group's properties were valued at Â£657.8m (€740m), down significantly from Â£723.65m the previous year. Profit was Â£37.5m, while its rent roll increased slightly on the previous year to Â£47.8m.