One of Ireland's business dynasties, the Roche family's money came initially from cement and the company that in the 1970s became CRH.
Today they own the majority of renewable energy, water, wind and solar energy firm NTR, which is expanding its wind farm investments.
Tom (69), his wife Anne (68), and their sons John (32), Conor (45), and daughters Michelle (43) and Joanne (41) received €25m in dividends in 2017.
The four children have set up a charitable foundation based on their €30m interest in one of the family holding companies. The four also own just under a quarter stake in the Doyle Hotels holding company, which was founded by Anne's father PV Doyle.
She has shared in more than €800m of dividends from that firm over the past decade. The family also have property interests in Dublin, and John and his wife live in the Georgian house, once home to Oscar Wilde's mother in the capital.