Whakapapa gives us our connections to the land. You need to know where your whanau is from to find information in the Maori Land Court Records.
If your father is from the north and your mother is from the south, do not look for your father's lines in the southern records!
If your father and mother lived in your mother's area and you use your father's surname as your surname, do not confuse your children and mokopuna by teaching them that your surname is from the south. It is through your mother's whanau that you are from the south as it is those blood lines that give you the connections there and your father's whanau name is still from the north as that is where the blood lines are and the connections to the whenua.