Hi Geoff
Haven't yet checked to see if others are researching this NZ branch of the CLINTON family.
Rubina Ellen DAWSON was the last of the family to pass away - in 1994. In the event there are no other researchers, then you might like to contact the funeral director whose name is noted on her cremation record. They may be able to supply you with details of next of kin.
~ Lu
Added: Can't see a website for funeral director - however if you Google "Newberrys Funeral + Whangarei NZ" you'll find an email address for them.