On-line Te Reo Māori Dictionary

Ko Billy rāua ko Bob ā rāua māhanga.
Their twins are Billy and Bob.
Talking about more than one person - ...rāua ko..., rātou ko...

Ka titiro whakawaho atu ngā pirikoti ki te hiwi matomato i kō atu o tō rātou whenua.
The billy goats looked out towards the green hill beyond their land.

Kei a Billy ōku mōhiti
Billy has my glasses

Kāore ōku mōhiti i a Billy
Billy does not have my glasses