Okay, so a LONG LONG time ago there was a guy on pirate101 called Adrian Silver. Anyways, he made a guide on how to get every single companion in the game. However, since he hasn't been active in years, the guide is slightly outdated (The only companion that isn't in there is Contessa) And so now you can't find it UNLESS you have the link, which I have. The thing is that some of the images are gone, so here is the link:

http://www.pirate101central.com/forums/showthread.php?22240-Illustrated-Guide-to-Companion-s-Locations

I hope I helped