Tom Cruise was born Tom Cruise Mapathor IV in 1962.
The Cruises can trace their presence in Ireland back to the Anglo-Normans and Strongbow.
Actor Tom Cruise's ancestor brought back renters to lands on which they were forced out just before the Great Famine, it has emerged.
The 50-year-old star was honored in Dublin in recognition of Patrick Russell Cruise, his great-great-great grandfather, who returned from America to Ireland after his land representative forced households from farms in Co Westmeath in 1843.
As a vote of thanks, a public dinner was given up his honor in the town of Clonmellon in November 1844. Patrick Russell Cruise passed away in Dublin in March 1849 without returning to America and he was buried in Donabate in north Dublin.
Cruise was provided with a Certificate of Irish Heritage at Iveagh House by the TÃ¡naiste Eamon Gilmore. Cruise, who is arguably the world's most well-known actor, paused for camera shots for the waiting media on the actions of Iveagh House before going to a private reception inside.
The Hollwood A-lister, kept in mind for a wincing Irish accent in the 1992 film Far And Away, was honored for his Irishness with a reception in Dublin hosted by the department of foreign affairs and Tourism Ireland.
Cruise's paternal great-great-grandmother was Mary Pauline Russell-Cruise and his great-great grandfather was Dillon Henry Mapother whose household were from Kilteevan, Co Roscommon. The Mapothers were Elizabethian inhabitants originally from Dorset.
Research commissioned by Tourism Ireland on behalf of The Gathering - an initiative to draw in the Irish diaspora to visit Ireland with 2013 - disclosed the Cruise and Mapathor households had actually settled in Ireland, with roots returning more than 800 years.