An introduction to thirteenth infallible Imam Hassan Askari (pbuh)
The eleventh bright star of Imamate appeared on the horizons of the sky of guardianship (willayat) in Madina and set in Samarra.
His name was Hassan and surname Abu Mohammad and the well-known titles were "Zaki" and "Askari". His father was Imam Hadi (A.S.), whereas his mother's name was Sausan. …http://library.tebyan.net/books/4176/1.htm#searchFirst