Okay kiddo, so Tomás Domínguez Arévalo is a person, just like you and me. He has a name made up of four words!
Tomás is his first name, just like how your name might be Billy or Emily. Domínguez is his last name, just like how your last name might be Smith or Johnson.
Arévalo is another last name. In some countries, people have two last names to show where their family comes from. So Tomás might have two last names because his family comes from two different places or has two different cultural backgrounds.
We don't know much else about Tomás from this name alone! Maybe he likes to play sports or read books. But just like you and me, he is a unique person with his own story to tell.