Worldwide, Касилин (Kasylyn , Касилин ) is a very rare girly first name. More frequently, Касилин is the last name as well as the forename.
Kasilin
Олег, Владимир, Геннадий, Анатолий, Евгений, Валерий, Николай, Дмитрий, Алексей, Александр, Сергей, Никита, Андрей, Михаил, Матвей, Игорь, Вадим, Юрий, Иван, Виктор, and Владислав
, Касилин 
) is a very rare girly first name. More frequently, Касилин is the last name as well as the forename.