Being at work, I have not my Tolkieniana to permit me to answer knowledgably on your questions regarding the Gond or Thu/Tuvo. But it is entirely possible for Morgoth/Melkor to have "created" or, more likely, twisted the false-faires for his purposes in the same sense of many of his other creatures or servants. Morgoth never "created" any species per se; for example, orcs were his creatures, but distortions or blendings of existing races (most likely elves), while other servants, maiar such as Sauron or the Balrogs, were beings drawn to his service and distorted to foul ends. I suspect that false-faires were more likely the latter, although there appears to be no definitive answer in Tolkien's writings. I know of only a few brief references on the subject.

: If you are really kind, send me an E-mail in addition to your posting please, on Hispr@stud.hum.aau.dk I will appreciate any thoughts, and use my interpretation of the results in a Roleplaying campaign module concerning Fourth Age Arnor that will be spread among my friends (as it violates certain ICE copyrights). Thanks

Fourth Age Arnor/Eriador? Fascinating. I'd be interested to see what you come up with. As I noted in my last post below, the lack of information on ancient and contemporary Arnor has been a subject of curiousity on my part for some time.