First let me stress I'm NOT a lawyer so don't take this in lue of actual legal advice.
I'm late to this and I know you are talking about Pathfinder, but in case this comes up for someone else. For example the D&D OGL. You can use anything here:https://www.wizards.com/default.asp?x=d20/article/srd35 INCLUDING names and descriptions as it is all considered under the OGL. Things like Elf are common parlance, but you will notice they don't use "Drow". So you couldn't use that name in any way. Dark Elf however is common parlance so you could. You would have to be careful in their description as well because describing them in a way that would identify them soley as "Drow" would be illegal as well.
Now as for Pathfinder part of the 3.5 OGL specifically states you have to clearly define what, if anything, you are adding as part of the OGL. I haven't looked, but if there is anything added that is part of the OGL it should be clearly listed on the official Pathfinder rules site. While other parts are pertinent here are the two that most apply.
Quote:
... (d)"Open Game Content" means the game mechanic and includes the methods, procedures, processes and routines to the extent such content does not embody the Product Identity and is an enhancement over the prior art and any additional content clearly identified as Open Game Content by the Contributor, and means any work covered by this License, including translations and derivative works under copyright law, but specifically excludes Product Identity. ....
Quote:
8. Identification: If you distribute Open Game Content You must clearly indicate which portions of the work that you are distributing are Open Game Content.
So anything they add as OGL and NOT specifically solely for their product is governed by this OGL and they must clearly indicate which portions they are adding to the OGL.
Now I'm not going to look for it because I don't want to claim something is part of the OGL and have it not be, but it should be there somewhere and if it isn't SPECIFICALLY outlined in their OGL then by inference it is excluded. If in doubt then it isn't covered by the OGL.
In lue of all of that write Paizo and ask them(though they may just redirect you to the site). :D