- Son Luke Christopher Niethen Kelly was born on 29 June 2000 in Krefeld, Germany.
- Son Leon Niethen Kelly was born on 20 January 2004 in Cologne, Germany.
- Brother of Kathy Kelly, John Kelly, Patricia Kelly, Jimmy Kelly, 'Barbie Kelly', Michael Patrick Kelly, Maite Kelly, Angelo Kelly.
- Ranked 2nd in the ultra marathon bicycle Race Across America together with Jutta Kleinschmidt (2002).
- Only triathlete, who participated in all Ironman events within one year.
- Besides his musical career, he is a professional triathlete and marathon racer.
- Born to Daniel Jerome Kelly, founder of the music group The Kelly Family, and his second wife Barbara Ann Suokko.
- Daughter Lilian Ann, was born on July 7, 2006 in Germany.
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