他叫什么名字用英语怎么说?

What's his name

his name is ~~

if you want to know his name ,you can ask 'may i know your name ?' or what's your name ?
but if you are strangers to each ,i suggest you use the former one

前一种说法比较婉转，适合于初次见面

What's his name?
How can I call him?
What's the name of him?

What's his name

What's his name?

他叫什么名字？

What _is _he\she_ name ?