Jurble
I'm reading my Stormlight books in anticipation of the newest and I noticed Teleb being an Oldblood - a detail that I hadn't noticed or remembered the first time around. A search on Coppermind shows that you said they were simply a previous dynasty that ruled Alethkar back in 2014.
I wonder if I'm reading too much into it - but are the Oldbloods perhaps descended directly from the Knights Radiant whereas other Lighteyes are descended from later non-Radiant Shardbearers?
Brandon Sanderson
You're not reading too much into it--Oldbloods claim to be able to trace their lineage to Knights Radiant, but don't talk about that aspect of it as much because of the poor reputation of Radiants until just recently.