His grandfather , Reverend John Macky , was the first moderator of the Presbyterian General Assembly of New Zealand to marry Edna Graham Allan in Dunedin in 1920 . His grandfather , Reverend John Macky , was the first moderator of the Presbyterian General Assembly of New Zealand . In 1920 Macky married Edna Graham Allan in Dunedin . His grandfather , Reverend Edna Graham Allan , was the first moderator of the Presbyterian General Assembly of New Zealand . In 1920 Macky married John Macky in Dunedin .