Humans are the descendants of the vrykul found in Northrend, but they're a far weaker version of them. They used to live in tribal communities until a rising empire of trolls forced them to cooperate. Since then, they've become one of the most powerful factions in Azeroth.
Human names are usually (old) English names and last names, but depending on the person, the names can be pretty much from any language.
However, for simplicity's sake I've only used English names, since there are plenty of other name generators in various languages on this site.