Details of Michael's birth are not known.

Michael married Susan Mary Greenhough on Monday 8 July 1963.

He had the following children from his marriage to Susan Mary Greenhough:

- Patrick Andrew Northmor O Connor	born in 1964 (date suppressed).
- Cavan Ian Northmor O Connor	born in 1965 (date suppressed).

Details of Michael's occupation are not known.