Andrew grew up to become a Warehouse merchant in Dunedin. He founded the business - Fairbairn, Wright & Co - based in Dunedin.
He married Ada Pilkington in Dunedin in 1890. But his name was recorded as Andrew Fairburn Jr in this official record. They had 3 daughters and one son.
Marriage Record - 1890 - "New Zealand, Civil Records Indexes, 1800-1896," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q24K-XLF1 : accessed 4 April 2017), Andrew Fairburn Jun and Ada Pilkington, 1890; citing Marriage, New Zealand, New Zealand, Wellington; registration number 1890/3345.
It may be possible to confirm family relationships with Andrew by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: