Earlier quoted context omitted.
That's technically not a stock image, it's a portait that has been public domain for a long time.
But you've seen many PD images reshared by stock imagery companies. It raises the question of why false assertions of ownership aren't easily prosecuted, given that they constitute a kind of fraud upon the public.
If something's public domain, anybody can use for anything they want, even if that's just rehosting it with your watermark.