There is a genealogy book called "Tides of Time" about the Stanaway family that holds some of the genealogy for Richard Hempley Marriner (son of Matthew and and his wife Rachel of Scarborough) a British naval architect who came to NZ in 1825 to buy timber,
Richard married a maori woman named Hira, in Hokianga in the 1800s, it lists Their son George Marriner who married Rora Karena.
(Richard and Goerge were later buried at Maungangungu )
And also George and Rora'sson George(Hori Marena) Marriner b.1864who married Hera Minarapa Tika, and the book lists their descendents. It was done in the 1980s.
Emailme email@example.com if you want digital copies of any documentation, I have photographed the book too.