The issue here is not how you call that name: maiden name, birth name, whatever.
The issue is that the checker considers it to be an error when men have only last name and not that other name (birth name, maiden name, whichever way you call it).
And solution for fixing that error (which is actually no error at all), as suggested by the checker, is to add some random name to that birth name field. I have hundreds such profiles. Quite often the checker suggests, there should be mother's maiden name, but this is completely wrong. How can it be, that adding completely wrong name, will make the things OK for the checker. And vice versa, when everything is OK, then it is considered to be an error for checker?
for example:
Jaan Lepp
Jaan Lepp. this person has first name and last name, so seems everything is OK, but checker says, this profile has an error, because this person does not have birth name and suggests either "Lep" or "Masik" should be used (with one click fix).
Masik was that persons mother's maiden name, which she gave up on her marriage 18 years before this Jaan Lepp was even born.
This is absurd, when adding completely wrong names to profiles, makes this error status disappear.