Details of Jonathon's birth are not known.

Jonathon married Susan Patricia Riley on Saturday 25 May 1991.

He had the following children from his marriage to Susan Patricia Riley:

- Daniel John Moriarty	born in 1989 (date suppressed).
- Marie-Louise Moriarty	born in 1991 (date suppressed).
- Samuel Joseph Moriarty	born in 1994 (date suppressed).
- Megan Rose Moriarty	born in 1996 (date suppressed).
- Olivia Susan Moriarty	born in 2000 (date suppressed).

Details of Jonathon's occupation are not known.