The language they spoke is refereed to as old Norse..............the Vikings themselves might have originally come from Russia....................

§ 80. I have seen the Rus as they came on their merchant journeys and encamped by the Volga. I have never seen more perfect physical specimens, tall as date palms, blonde and ruddy; they wear neither tunics nor caftans, but the men wear a garment which covers one side of the body and leaves a hand free.

Note: Although Ibn Fadlan here says the men go without "tunic or caftan," he later describes the funeral of a Rus chieftain, who is specially dressed in both tunic and caftan before cremation (§ 89). The tunic probably corresponds to Old Norse kyrtill, "a knee-length tunic with sleeves which was worn belted." The caftan is a heavy woolen overgarment, known in Old Norse as an ólpa. The "garment which covers one side of the body and leaves a hand free" must be the Norse rectangular cloak (Old Norse möttull, skikkja, or feldr) which was worn pinned at the right shoulder leaving the sword-hand free.