Her daughter was named Rata but this name was changed on her adoption. The details for her daughter are established and her family are in contact.
Hi Jo ... arriving here from your other thread ("Maori records").
I can't help (as yet) with any information for Edith Ethel KERRIDGE, but here is the registration of Rata's birth from the NZ BDM online index (where it is possible, with some tinkering, to deduce the "date of birth").
1920 / 25604 - GIBSON - Rata Gertrude
Parents: Annie Ellen and Arthur Henry GIBSON
D.o.B. = 28 June 1905Interesting that this wasn't registered until
1920 ? ... and why, if her christian names had changed at adoption, these weren't used in the registration.

[PapersPast ("Evening Post" - 19 January 1926) confirms in an engagement notice that Gwenda Eleanor was the only daughter of Mr and Mrs GIBSON of Ngaio, (Wellington) ... but only a son gets a mention in the obituary of Arthur Henry GIBSON (d. 1940).]
But back to Edith KERRIDGE, the birth mother. (see next ) >>
~ Lu