What's his given name?

What's his given name? what's your given name what' s his name? What's his name? What‘s your given name?为什么填given what's his last name? 22.---What’s his name?---His name is ________ . What's your given name?定语为什么不是your而是given? what's -his-name 如何理解 What's his name?用her改写 英语：What's his family name. -What’s his name?-（ ）Peter Brown.