Твій ім'я Віктор is the same way to this isn't it?
Твоє ім'я Віктор. Ім'я is neutral
What is the difference between Вас and Ваш?
Вас means you, ваш means your
Then why is it вас in this sentence? ...your name...
Because more literally it means "you are called" so either dative or accusative
Вас is you and Ваш is yours
What is the familiar form of вас? I'd guess тебе but that's Russian, is it Ukrainian as well?
Тебе is actually Ukrainian (тебе звати ...). Тебя would be Russian (тебя зовут ....)
A good guess then! Actually I'm getting the cases wrong, тебе looks like dative but actually I see it's accusative