Onsori:

Abolqasem Hassan Ibn Ahmad Balkhi (Onsori) was born
in Balkh,in 350 A.H.
Onsori was the student of Abdolfarah Sagzi the (poet of the
4^th century). It is said that his poetical works are about
3000 verses but only some of them are available. He died
in 431 A.H.