A name is a term used for identification by an external observer. They can identify a class or category of things, or a single thing, either uniquely, or within a given context. The entity identified by a name is called its referent. A personal name identifies, not necessarily uniquely, a specific individual human.

What is his name meaning?

informal. : a man whose name one has forgotten or does not know I think she's still dating what's-his-name.

Was his name or is his name?

'Was' is always correct and always sounds natural. 'Is' can be used if the past tense 'said' is unimportant. You know now that his name is Henry.