Thanks, Sue. Yes it does look like I may have to get his marriage or death cert. The name Angella was a mistranscription, she was actually Jane Mazella.
NZ death certs are absolutely wonderful. They not only name the date, place and cause of death, as British ones do, but also the name of parents, maiden name of mother, occupation of father, when and where buried, where born and how long they have lived in NZ, when married, age at marriage, to whom married, age of widow, number of children still living and their gender and ages!
So I think I might send for his death certificate!