So I was rereading Elantris, and found the word "Jesker" in it. "Jesker" refers to a now extinct (or nearly so) religion practiced by Duladel prior to its collapse and and ressurection as followers of Shu-Dereth.
This is obviously a reference to "Jesk" (aka what Hoid does for a living)
So now we have a cosmere link aside from Worldsingers/Worldbringers. Are there any more, specifically on Nalthis, as we have Roshar, Sel, and Scandrial covered?