The story as I heard is that once upon a time there was a man (buzurg) who left his village to spend the rest of his life alone, and went up to Shugran hills intending more worship.
He took one goat with him, so that he can use her milk.
The whole day she roamed around and returned back in the evening.
One evening she did not return, so next day the man started to look for her, and far away, he found her head (Siri),
She was probably killed or eaten by a wolf or predator.
He burried the head there and started his search again and found her legs around a mile upwards on an other hill from where he burried the head.
He burried the legs (Paye) too.
So after that incident, those places were called Siri and Paye.