Green’s Dictionary of Slang

wafer-woman n.

[? her posing as a legitimate maker of wafers, i.e. filigree]

a madame.

[UK]Beaumont Woman Hater II i: Those are damnable Bawdes, twas no set meeting certainlie; for there was no wafer-woman with her these three daies, on my knowledge.
[UK]Fletcher & Rowley Maid in the Mill I iii: Am I not able [...] to deliver A Letter handsomly! Is that such a hard thing? Why every wafer-woman will undertake it.