Throughout the world, Syonov (Syonov , Сионов ) is an extremely rare unknown gender first name. Much more frequently, Syonov is the last name as well as the forename.
Сёнов, and סיונוב
Batya
, Сионов 
) is an extremely rare unknown gender first name. Much more frequently, Syonov is the last name as well as the forename.