After 10 months I think I've finally figured out people's names here. It doesn't work the way it does in America and Europe. There, we get Dad's last name and a couple other names our parents pick out of a baby name book.
I noticed that in Ethiopia everyone is referred to by what I think of as their first name. Let's take, for example, a fictitious Dr. Yohannes. His full name is Yohannes Abebe Birhanu. If it were in the States, he would be Dr. Birhanu. But he's not; he's Dr. Yohannes. Here's why: at birth everyone gets their own name, and they only get one. The way to tell one Yohannes from another is you also refer to them by appending their father's name (his only name) and his grandfather's name (the grandfather's one name).
Take me for example. If we used Ethiopian naming conventions for me, I would be Mr. Marc (my one and only name). We would separate me from all the other Marcs by appending my father's name (Robert) and my Grandfather's name (Arnie, a Finnish name). So I would be Mr. Marc Robert Arnie. My father's name would be Robert Arnie Victor (his grandfather's name).
Now it all makes sense.