These are probably difficult questions:
1) Which sects and clans were created by JY?
2) Which ones are not created by JY but they are real?
3) Are the ones created by JY copyrighted where as other authors may not use their names? If so, does it also apply to their kungfus?
I know JY's novels take place historically, just curious which are facts and which are fictions in respect to sects and clans.