If Betty was the maid and the cook, I would write...
They went to Oregon with Betty who was a maid and a cook.
They went to Oregon with Betty, the maid, and the cook.If Betty was the maid and the cook, I would write...
They went to Oregon with Betty who was a maid and a cook.
They went to Oregon with Betty, the maid, and the cook.
The maid implies there was just one. Who travels with their only maid? Who will keep the manor lights on?
> They went to Oregon with Betty, the maid, and the cook.
Betty could be the maid. English meaning depends partly on word order:
Still ambiguous. In the former, I suppose the maid might be the cook also. The latter moves more easily and with less ambiguity.