The Cherie M. Mathison of New Zealand

My last name is spelt Mathison it got changed from Matheson.The only family i know of on the mathison side is in New Zealand. My Fathers name is Roy Lesley Mathison and my Mothers is Sharon Hazel May Tyrrell. My fathers mother and my Grandmother is Lesley Robertson Burns some how related to The poet Robert Burns (Robby)and his father Clive Malcolm Mathison. My mothers parents are Andrew James Tyrrell and Doris Mabel Best.