Awwa? That's what my DD says for water...

OK, that's just silly. I love Tallulah and River. I think they're beautiful options.

River names I like:

Acheron - in Victoria. I have beautiful memories of sitting in a rockpool there.
Avon - a little bit "The Wire" but I'm OK with that.
Huon
Richmond
Clarence
Maranoa - I love hearing about this river on the radio. We went there when DD was little, and it is full of life.

Banjo, as in the man from snowy river (or author of, at least) is that a bit far?

Isis - her tears were believed to be the cause of the flooding of the Nile

Wyatt - means from the wood or water

Anyway, that's what i have for now