Looking for Mckeowen IN New Zealand

My maternal gm was Julia McKEOWEN b 1881 d 5 Sep 1961, Palmerston North, NZ. She married James Michael FITZPATRICK b 1880, d 10 Jun 1938, Palmerston North. They had 4 children Thomas, James, Patrick, Catherine(Brenda). The early years of the marriage were in Wellington. But I believe the McKeowens origins were in the Taihape NZ area. Julia, I think, had 2 sisters (?Molly and ?Nora). These are the bare facts I know of both g'parents.