关于“他的名字是什么”的英语翻译，综合多个来源的信息整理如下：

基本翻译

What's his name？

Who's his name？

What is his name？

补充说明

在口语中， What's his name？是最常用且自然的表达；

若需强调全名，可用 What is his full name？；

在特定语境下， Who is he？可用于询问身份而非直接询问名字。

示例对话

A: Hello! What's your name？

B: I'm Tom. And what's your name？

A: I don't know. Who's this person？

B: This is Mr. Smith. What's his name？

建议根据具体语境选择表达方式，日常交流优先使用 What's his name？。