How do you say his name is in welsh?

There are two ways to say "his name is" in Welsh, depending on the context:

1. Ei enw yw... - This is the most common and literal translation. It literally means "his name is...". This is used in formal situations or when you are talking about someone you don't know well.

2. Mae'n cael ei alw'n... - This phrase means "He is called...". This is more informal and can be used when talking about someone you know well.

Examples:

* Ei enw yw John. (His name is John.)

* Mae'n cael ei alw'n Siôn. (He is called John.)

It is important to remember that Welsh has a mutable consonant system, which means that certain consonants change depending on the sounds around them. In the phrase "Ei enw yw...", the "n" in "enw" changes to an "m" because it is followed by a "y" sound.

Remember: When speaking Welsh, it is always best to use the most natural and appropriate phrase for the situation.