How do you say grandma and grandpa in Samoan?

Grandma is Tina (same for Mother); Grandpa is Tama (same for Father). Grandma: Mother of my Mother (Tina o lo'u Tina), Mother of my Father (Tina o lo'u Tama). Grandpa: Father of my Father (Tama o lo'u Tama), Father of my Mother (Tama o lo'u Tina).