Euternatia

Hello.

I’ve come across a seemingly obscure classical mythology reference to the above figure in a trad music song called ‘bad luck to the rolling water’ and I was wondering if any of you had any insight?

The full verse is

“She might not have been Aurora, a Flora or Diana,
But she sang songs in the back tap room along to the ould piana.
She was not Euternatia, nor was she Venus bright,
But she could drink much more than you and beat you in a fight”

The rest are all classical mythological figures, and to someone with my limited knowledge, Euternatia sounds like it might be Greek or Latin.

Any advice would be gratefully received