Wall, rampart, earthwork. Also means halyard, but not in this particular instance. Previous name of walliwahe (±1913) rejected for sounding too much like a Scotsman arguing with porridge.
Old Viru. Previously Alte Lehmstraße / Старая Глиняная ул, old clay street (1889, etc.) and Narvsche Straße / Нарвский выезд, Narva road/egress (1889, etc.). See Viru tänav.