Is it weird to have dreams about persons we've never seen/met ?

In several dreams of mine, I get to see people that I have never seen or met, people with whom I go to places, I talk to them, and they seem so familiar in dream, I just feel awkward when I wake up, I feel like I have to meet these persons…is it weird ?
I don’t see these people all at once, but every time I dream of a different person, and I have this kind of dreams from a while to a while, I want to know if there may be a psychological explanation to this…