It’d be interesting if men took on their wife’s first name, so it would immediately indicate to others if a man was married or not. And then there’d be pushback, in the same way there is to the ‘Mrs’ and ‘Miss’ titles, and parents would start naming their sons with female names to start with. (it works less well the other way around, because there’s already girls called ‘Dylan’ and ‘Taylor’, etc).

What if we did like Quebec instead and didn’t take anybody’s name… Remain your own person. Enough with this antiquated BS.

Here’s one example of this system in use https://en.wikipedia.org/wiki/Icelandic_name

Edit - I realize I probably misunderstood the question. But as said in another comment, it’s just a swap if we’re not talking about patronymic/matronymic naming systems.

Americans already have a confusing number of unisex names, so why not make all names unisex. The gender noun confusion clearly isn’t enough, so why not max out the potential confusion you can create.

In this world I suppose we’d start referring to people by last names more often