Try each spelling of the name. Hire an investigators. There are some very good ones.

Where do you know them from, who else may know them,
And to want to find someone, we have to had know them for some reason and must know something about them

I'm an investigator and I would need more information - such as what has been requested from you.

I'm confused by your posts - here you are the wife of a man who just found out he's not the biological father of a child he raised and you want to know how to tell the boy. https://www.askmehelpdesk.com/family-law/son-not-son-now-what-506246.html

Here you are the father - same scenario, same question - https://www.askmehelpdesk.com/children/when-how-do-tell-son-im-not-his-biological-father-506412.html

Now you are looking for someone. What is going on?