sarasvant - (which occurs in the Rigveda [5] as the name of the keeper of the celestial waters ), derived from Proto-Indo-Iranian sáras-wn̥t-iH (and earlier, PIE *séles-wn̥t-ih 2 ), meaning "with (many) pools". Sanskrit saras- means "pool, pond"; the feminine sarasī́ means "stagnant pool, swamp". [6] Cognate to Greek ἕλος "swamp",