people cross plants, and come up with their own strains all the time.
there very well could be a local strain by some grower which was named amsterdam goo.
names are names, they mean very little... there are HUNDREDS of strains. Only the big names are important, the rest are all just mixed and matched to form new ones, which are then mixed and matched again. In my opinions... who cares?!

smoke up buddy. The stuff sounds awesome