Sonja Alette Pettersen is the daughter of Armand Eckhoff Pettersen and Constance (Connie) Thomas.

Sonja was born in 1953 in the Liverpool South Registration District (Dec qtr).

Sonja married Michael Doherty in 1976 in the Liverpool Rogistration District (Sep qyr).

She had the following children from her marriage to Michael Doherty:

- Liam Patrick Doherty	born in 1982 at the Bradford Registration District (Sep qtr).
- Cavan Michael Doherty	born in 1984 at the Bradford Registration District (Jun).
- Niall Roraigh Doherty	born in 1986 at the Bradford Registration District (Sep).