User blog comment:Xilinoc/Ch. 543 - Letters/@comment-5138140-20130626204634/@comment-11051098-20130627072622

The Ishida family was apparently states somewhere to be of a very strong line of Quincies. Maybe it isn't so strange that Uryû could be an Echt Quincy despite his mother being a Gemischt. Or if not an Echt, he could have powers on the level of an Echt because his family is of a strong Quincy line.

On a side note, I do agree that Buzzbee sounds better than Bazz-B. But it's not the most ridiculous name Kubo has come up with.