Globally, Taishev (Тайшев , Taishev , Таишев ) is an extremely rare unknown gender forename. Much more prevalently, Taishev is the last name as well as the forename.
Таищев, and Таішев
Mr, and Igor
, Taishev 
) is an extremely rare unknown gender forename. Much more prevalently, Taishev is the last name as well as the forename.