Kwek-kwek is my fave streetfood! <3
I don't know the details with regards the manong sauce, but as for the name...
Manong is what we usually call an elderly man. I guess most male vendors who are older than us, we call them "Manong", thus the name... :D It depends on the area, though... ^^
oooh maybe that's why they call it that way since basically it is referring to the seller. Are there any other names than Manong's sauce?
Not sure if there are names for it... I didn't even know Manong sauce. haha The seller would usually just ask us, "Do you want sauce? sweet or spicy?... it may be common in some areas in the Philippines, but in my area in Cebu, none that I know of. :)