Is it a requirement for witnesses to know the names of the assailants?

Witnesses need not know the names of the assailants, as long as they recognize the latter’s faces. What is imperative is that, on the basis of their personal knowledge, the witnesses are positive as to the physical identification of the perpetrators. (People v. Sorila, Jr., 578 Phil. 931 [2008]).

Thus, it was sufficient that the witnesses were able to identify the accused in the crime scene and when they took the witness stand.