In 1969 my father John Shirley Going (aka Jack) was in New Zealand and spent some time with Goings there.
You will find a wealth of information in the paperbound book HISTORY OF CAPTAIN JOHN GOING HIS ANCESTORS AND DESCENDANTS.The aughors wer Keith Going, with whom my father met I believe, (10 Stanton Tce. Mt. Roskill, Aukland, NZ) and Cyril M.C. Going (Towai Post Office, Northland, NZ).I can't give you the publisher as the foreward is inscribed "When published, copies will be obtined through the authors.)There are pictures of family estates Birdhill, Cranna, Violet Hill and Traveston in the book.
I have a tree which begins with Robert of Cranagh (will proved 8 July 1732) descends to his six children, follows the line through his son Robert of Ratherles and ends with the generation of my children.I have other material which is scattered through my library and files which may serve to answer some of your questions.