McGuinness is the daughter of Martin and Donna Smyth
McGuinness of Newtownbutler, County Fermanagh, Northern
Ireland. She was christened in Saint Mary’s Catholic Church
in Newtownbutler on July 5, 2014. Her Godparents were her
uncle Kevin McGuinness and her mother’s sister Nicola Smyth.
Niamh is the great-great-great granddaughter of John “Big
John” and Margaret McAdam Tinneny of Goladuff, Newtownbutler,
County Fermanagh, Northern Ireland.