It's important to note that "Avondale" is an English name, often used for places and sometimes as a surname. The name itself likely derives from the English words "Avon" (a river in England) and "dale" (a valley).
However, Māori does have many words that relate to rivers and valleys, so depending on the specific context, you could use words like:
* awa: river
* awa-ā-te-atea: a wide river
* tapu: sacred, which could be used for a river or valley considered sacred
* whenua: land, which could be used for a valley
* moe: sleep, which could be used to describe a valley nestled between hills
Ultimately, the best Māori translation for "Avondale" would depend on the specific context and meaning you want to convey.