This Herbert John the husband of Catherine Dulcie Donovan appeared with Catherine in the 1950 Census in the US. He is not therefore the son of Thomas and Elizabeth (nee Wyeth) Sunnex who died in 1948 aged 42 years.
[S10] Marriage Register Index , England & Wales, Civil Registration Marriage Index, 1916-2005 (Reliability: 3).
Donovan, Sunnex - 11a 1167
Date of Registration - Oct-Nov-Dec 1942
Registration District - Pontypridd
Inferred County - Glamorgan
Catherine Donovan
Herbert J Sunnex