User blog comment:Xilinoc/Ch. 586 - The Headless Star 5/@comment-11506376-20140625171259/@comment-11051098-20140626134549

That's right, Uryû is the only Gemischt Quincy still living. Ichigo comes in addition, but his powers were dormant at the time.

That said, maybe a few Sternritters, like Äs, could be ordinary humans who were given Quincy powers from Yhwach, in some way. Seeing as he can imprint pieces of his soul into other Quincies and give them power, he can probably do that to ordinary humans as well.