Thanks all
Looks like it may be the right person anyway - will add it to my list to check the death the next time I am at PRONI
They lived in McDowells Row in Greencastle, which as far as can make out was demolished for the building of the M2, and West Crescent seems to be Newtonabbey - so makes sense they would move there.
The only immediate he had was his sister Ellen, which again ties in with this,
Thanks everyone for their help with this
(PS - apologies this should be in the Antrim forum, not Down - but his father is from Artana, Dromara, Co Down)