叫【jiào】

叫 gives a full name or a given name. It is a verb, so no 是 goes with it.

Asking

什么 can be dropped in casual speech: 你叫什么？

叫 against 姓

姓 gives the surname alone; 叫 gives the given name or the whole name. 我姓王，叫王明 is the standard way to introduce yourself in full.

Answering 你姓什么 with a full name, or 你叫什么名字 with a surname only, both sound off.

For a polite enquiry

您贵姓 is the courteous version, and the answer uses 姓, not 叫.

叫 as "to call" and "to tell someone to"

Two other uses of the same verb: summoning someone, and instructing them.