The runes IKUARI, or Ingvar, on runestone SÃ¶ 281. Ingvar the Far-Travelled (Old Norse: Yngvarr vÃ­Ã°fÃ¶rli, Swedish: Ingvar Vittfarne) led an unsuccessful large Viking attack against Persia in 1036â1042. The Rus' undertook several Caspian expeditions in the course of the 10th century.