I think the Hebrew word "Rosh" means the Hebrew word "Rosh", which in turn means "head", as in Rosh Hashanah (Happy New Year).
Not to mention that the Russians have been at war against Muslim invaders for over 1,000 years (hint: the Mongols were Muslim after converting in 1260) and anyone who thinks Russia would have a civilizational alliance with the Muslims is proving that he or she literally knows nothing of Russian history.