If you don't know what they are or where they came from then you will never know there are so many hybrid peacocks out there. The guy could have got the male from somewhere and the females from somewhere else, people regularly buy a male "peacock" and then buy random females from stores match them and breed them so it is almost impossible to know.
I can tell you they are not jacob females as well, they are one of the few peacock females you can have a rough guess at, although I wouldn't be confident on 100% iding any female peacock.