I've never heard it pronounced any way other than Byoo-la. It's usable only in the sense that it is an actual name and there is no law on the books saying you can't use it.
But my advice is don't use it. It's the kind of dated that will not come back and it was only popular very briefly. It died out because it deserved to die.
It's also often seen as a very negative, often raciallly-tinged, stereotype for a maid.
We don't need to set the sky on fire. A little glow will do just fine.
Bob Ross