Fife -> New Zealand connection, in particular. I have a Henry George Gibb, born in Fife in 1840, married in New Zealand (somewhere) in 1863, then emigrated to Australia (with wife and possibly one son) around 1865, to have several children and settle down. There seems to be no "reason" for going to or leaving New Zealand. Existing relatives there would be a valid one. Robert is a family name, too.