我姓XXX 名 YYY

姓 means family name. we usually use 我的名字叫（your full name）

姓 is you family name, which is passed down from your father, while 名 is your own name, 我的名字 is when you put your family name and your own name together.

Most often you'd just say "我叫...," wo3jiao4, which means "I am called." 姓 refers exclusively to your last name, and you can use it as a verb. Often people will ask "你姓什么？" You can answer with "我姓..." You could also say "我名字叫..." But you'll rarely use 是 when talking about names.