On-line Te Reo Māori Dictionary

Ko Chris te tama a Richard rāua ko Gin.
Chris is the son of Richard and Gin.
Talking about more than one person - ...rāua ko..., rātou ko...

Ko Aria te tamāhine a Hēmi rāua ko Rina.
Aria is the daughter of Hēmi and Rina.
Talking about more than one person - ...rāua ko..., rātou ko...