This can be stated in active form. Alternate translation: "Someone had written on her forehead a name" (See: [[rc://en/ta/man/jit/figs-activepassive]])
If it needs to be made clear that the name refers to the woman, it can be put in a sentence. Alternate translation: "I am Babylon, the powerful one" (See: [[rc://en/ta/man/jit/figs-explicit]])