Mervyn Niall Wingfield was the 10th Viscount Powerscourt, and also Baron Powerscourt, of Powerscourt in the County of Wicklow, in the Peerage of the United Kingdom, succeeding his father on 3 April 1973.
- Occupation
- politician
- Position held
- member of the House of Lords
- Citizenship
- United Kingdom
- Born
- September 3, 1935
- Died
- July 25, 2015