rātou ko - and also (joining 3 or more names eg. Bob, Jim and Fred)
rāua ko - and joining 2 names eg. Jim and Fred
Ko Jim rāua ko Doug aku taokete.Jim and Doug are my brother in laws.Identity sentences - ko...
Ko Jim taku matua.Jim is my dad.
Ko Jim te tama a Neha rāua ko Irene.Jim is the son of Neha and Irene.