In Shia sources, the name of Sufyāni has been stated and it was mentioned, as an imminent sign of the Emergence.

His name has not been stated in Sunni sources, but they just has told his features and characteristics.

Also, he was counted one sign of the resurrection.

It has been quoted from Imam Sādiq (pbuh):

“I am seeing1 Sufyāni who deployed [his troops] in Kūfah square.

And his crier calls,” Whoever brings heads of Ali’s Shiites, will be gifted one thousand Dirham.”
۱-           Imams, Prophet Muhammad, other prophets (pbu th), and other great majesties had the power of spiritual seeing; because of their piety and other spiritual features. So, the word” seeing” here refers to this type.

۱-           Nu’mānī, “Ghayba” Chapter18, P.426

۲-           Al-Ghayba, Ṭūsī, P.436, V.278