- Tonga, Kingdom of Tonga, Friendly Islands - a monarchy on a Polynesian archipelago in the South Pacific; achieved independence from the United Kingdom in 1970
--1 is a kind of country, state, land
--1 is a part of Polynesia
--1 has members: Tongan - Tonga - the language of the Tonga people of south central Africa (Zambia and Rhodesia)
--2 is a kind of Bantu, Bantoid language