Where does “Ngaruawahia” come from?

Ngaruawahia (English) comes from Maori Ngāruawāhia, from Maori rua, from Proto-Eastern Polynesian rua, from Proto-Nuclear Polynesian rua, from Proto-Polynesian rua, from Proto-Oceanic rua, from Proto-Eastern Malayo-Polynesian duha, from Proto-Central-Eastern Malayo-Polynesian duha — two.

Ancestry of “Ngaruawahia”, step by step

StepLanguageWordMeaning
1MaoriNgāruawāhia—
2Maoriruatwo; pit; cavity
3Proto-Eastern Polynesianrua—
4Proto-Nuclear Polynesianrua—
5Proto-Polynesianruatwo
6Proto-Oceanicruatwo
7Proto-Eastern Malayo-Polynesianduha—
8Proto-Central-Eastern Malayo-Polynesianduha—
9Proto-Malayo-Polynesianduhatwo
10Proto-Austronesian*duha—
11Proto-AustronesianduSatwo
Every word from Proto-Austronesian duSa →Every word from Proto-Austronesian *duha →Every word from Proto-Malayo-Polynesian duha →