Well, I imagine namehalfs from really major officers would count. Shu, Wu, Wei, Jin, and Han probably would as well.
City namehalfs mostly wouldn't; although some people would write Luoyang and others would write Luo Yang, apparently Luo gets through fine. You'd have to make an exception for Chang An, though, as An is popular for other reasons.
Same for You.
I tried the area names Ye and Xu, and both seem to be fine for searching. That must mean not too many officers are famous enough to cause problems; after all, neither Jia Xu nor Xu Huang's name isn't too common to break things.
Unless I specifically say otherwise, assume I am talking about historical Three Kingdoms, and not the novel.