Hans Holbein the Younger

According to what I found, this is Sir Thomas More's daughter, said to have been a scholar herself. Whoever labeled it gave her age, not her name.

Apparently this was one of a whole run of portraits made for the German merchants trading out of London around this time — I couldn't find much else specific to this one.

I couldn't find who this is — no name attached, just 'young man,' which feels like it should bother more people than it does.