There was no hack attempt. Dont worry about these emails. As explained, all someone did was put your username in the « Recovery password » screen, sending you the email. There is 0 things he can do with that. Even if you click the link, you will be one changing the password, and not him. He is the one who needs the link (which is on your email).
If you do the same with « theymos », is his account at risk? No.