Here's why:
* Peu means "little" or "few". It's not used to describe someone's name.
* Comment means "how", but it's not the right word to use when asking for someone's name.
* Il se nomme means "he is called" or "his name is".
To ask someone's name in French, you can use the following phrases:
* Comment vous appelez-vous ? (Formal - "What is your name?")
* Comment t'appelles-tu ? (Informal - "What is your name?")
* Quel est votre nom ? (Formal - "What is your name?")
* Quel est ton nom ? (Informal - "What is your name?")
The phrase "Peu comment il se nomme" likely doesn't mean anything in a meaningful context. It's possible it's a misheard or misspelled phrase.