early 13c., "feeling of pleasure and delight," from O.Fr. joie, from L. gaudia, pl. of gaudium "joy," from gaudere "rejoice," from PIE base *gau- (cf. Gk. gaio "I rejoice," M.Ir. guaire "noble"). Joy-riding is Amer.Eng., 1908.
I think when the slaves were freed, from Babylon, say, they rejoiced quite a bit.
Check my etymology for "goat", a page back.
I really am clairvoyant, LOL !!
Nobility, a hereditary caste
Noble may be to know, as in famous, but nobility is always about class and distinction of caste as Wiki tells us above. Free or a slave. Slaves were not nobility.
I have heard of noble slaves, and I also have heard of imprisoned nobility.
Noble is about respect and power and being generous.
OK, this is not my thing.