[perspective1]

IANAL but the basic sniff test is could "Postwoman" be confused with "Postman?" I think the answer is yes. With the author calling it an alternative to "Postman," you have the author acknowledging Postman is a strong trademark. And it's not like it's the only one available fitting the "{HTTP-METHOD}{MAN|WOMAN}" construct-- you could rename it "HeadWoman" and probably be okay.

[jedieaston]

And I don’t think GETwoman or PUTWoman would be good either, as there’s other apps for that.

[Mountain_Skies]

If she named it Going Postal, how old would one need to be to get the reference?