who is yonoson rosenblum?

it has been noted by many that popular artscroll biographer, yonoson rosenblum, has never been seen together in the same room as political pundit/ chareidi apologist, jonathan rosenblum. now, after reading the latter's scathing critique of opportunistic sex-rabbi/ fellow JPost journalist, shmuley boteach, i realized another such anomaly: hershel brand and jonathan rosenblum have never been seen in the same room! (see third to last paragraph...)