Hi there, if you have a look at Papers Past there are lots of 'Pilchers' there.
You know you grandfather's name, and if you also know his wife's name you can work your way backwards to sort out the generations/names etc.
Try NZ BDM historical records and Archives NZ too.
Here is some info from Papers Past - your gt grandmother perhaps?

OBITUARY.
MRS ROSE PILCHER.
Mrs Rose Pilcher, an old and well beloved resident of the Stanway district, passed away recently after a long illness, at the home of her daughter, Mrs Robinson, Taihape. Her husband predeceased her several years ago. Mrs Pilcher arrived in New’ Zealand with her parents in the sailing ship Karmatic in 1875. After her marriage she lived in Otaki, then in Halcombe, and subsequently went to live in Makino Road, where she resided for a great number of years. Mrs Pilcher is best remembered for her work during the Great War, for which she received one of the five special medals sent to New Zealand by the late King George. Of the large family of twelve children, nine are still living—Will (Tauranga), Jack (Otorohanga), George (Makino Road), Mrs Robinson (Taihape), Mrs Evans (Weraroa), Mrs W. B. Miles (Halcombe), Mrs Chamberlain (Masterton), Mrs Spiers (Levin) and mrs Mills (Dannevirke). Mr Charles Pilcher made the supreme sacrifice in the Great War. Three brothers and two sisters are also left to mourn the loss of their sister—Charles Churcher (Wanganui), George Churcher (Auckland), Frank Churcher (Masterton), Mrs Fitzgerald (Gisborne) and Mrs Woulfe (Hamilton). There are also fifty grandchildren and 33 great-grandchildren. The body was conveyed to the Stanway Church, where it lay for some hours before the funeral service which was conducted by Archdeacon F. Petrie, ALA., of Feilding. Six grandsons , acted as pall-bearers at the service, ! which was attended by many relatives and friends, there being also many floral tributes testifying to the esteem in which the deceased lady was held.
Manawatu Standard, Volume LIX, Issue 284, 1 November 1939

Thankyou for your information. Great reading. My GGG Grandfather was Stephen Pilcher who arrived in Wellington with his children in 1840. It looks like Rose was not related directly however if her parents came from Kent, UK then possibly a distant relative.
I know my fathers brother (Herbert Stanley Pilcher) had one child out of wedlock, however I know very little about her or where she lives. I have tried many avenues including your suggested ones without success. I have no living uncles, aunties, grandparents or cousins that I know of other than the above mentioned.

spooner ..
Rose (nee Churcher) married Edward Pilcher (1851-1933) in Feilding, 12 Dec 1876. Edward was a son of your ggg grandfather, Stephen Pilcher & Bennett Mather Hook
Edward & Rose had 12 children
1878 - 1949 William George Edward Pilcher
1880 - 1962 John Albert Reece Pilcher
1882 - 1973 Elizabeth Bennett Pilcher
1884 - 1918 Harriet Lily Pilcher
1886 - 1970 Margaret Florence Pilcher
1888 - 1918 Charles Stephen Pilcher
1890 - 1970 Olive Rose Pilcher
1892 - 1962 Myrtle Pilcher
1894 - 1962 George Pilcher
1896 - 2003 Ivy Winifred Pilcher
1898 - 1962 Alberta Isabel Pilcher
1899 - 1899 Kenneth Pilcher

In the 80s there was a Pilcher family reunion for all of Stephen Pilchers decendents eg your family, at which a book of the family history was available to purchase which was the family tree back to Adam pretty much. If you can get access to a copy you will have all the info
cheers

My ggg grandfather was also Stephen Pilcher from Kent UK, I’m trying to find a copy of the Pilcher genealogy of Tawa, my immediate family is in the book, I viewed it recently at a library but I would love my own copy. Does anyone know where I could buy a copy please. My gg grandfather was Stephen (Stephen s son, who migrated to Aust from Tawa). The author was Rex Evans.

Hi Alicep, this site on Family Search says it has one copy available. There are also contacts