Many contemporary Russian names, which have Christian (Greco-Latino-Jewish) origin, in actuality have the deeper roots, which exit to the immemorial Arian antiquity. It would be absurdly to assert that before the introduction of Christianity, which occurred only more than thousand years ago, in Russia there were no original names whatever. They were! And not only "elite" Svyatoslav, Vladimir, Vsevolod, etc., but also common people's - such as Vanya, Kolya, Jura, Olya, Ira, Varya, etc. later Christian church used age-old Russian names in our own interests exactly as it was adapted to many heathen holidays: even Christmas was combined with the earliest holiday of winter solstice and the heathen traditions of ryazhen'ya, carnival processions and Christmas carol in the honor of the winter sun Coles (Kolyady), whence and archaic name splitting. Names Vasilisa and single-root with it Vasiliy were inculcated in Russia precisely according to this diagram. In the transfer/translation from the Greek they indicate "tsar" and "tsarina".
However, were for sure combined from time immemorial the centuries by the existed in the Slavonian - Russian medium female names - Vasya, Vassa, Acya, etc. the same also with the dendrototemnium man name Of vasilek (on the name of flower) and, most likely, from it, but not from tsar - Vasiliy by the formed Old-Russian name of Vasilko and so forth this is why the sources of the origin of name Vasya (both in the man and in the female version), should be searched for not among the medium byzantine emperors and even not among the lightly corroded Hellenic "tsars", who precipitated I divide into three, but in the vediyskoy mythology and in the sacred bonfires of ancient Aryans. In Sanskrit there is an entire lexical nest with the root you, which makes many-valued sense:
1. "good", "favorable";
2. "is kind", "wealth/riches", "treasure";
3. eight demigods from "Rigveda", of the subject of Indra, which so are translated in the Russian by that not declined by teonim of "vasu".
From this root basis are formed other Sanskrit words: vasana - "clothing", "coated" and also vasanta - "spring", from which was formed the corresponding Russian concept, which indicates the time of the year - "spring". In the river bed of the enumerated ancient-Arian senses was born many thousands years ago female name Vasya (Vassa), combined subsequently with the the church of calendar.