The Verb 叫
The verb 叫 has several meanings. Here it means "to be called". It must be followed by an object, which can either be a full name or a given name, but seldom a given name that consists of only one syllable.
A: 你叫李生吗?
B: 我不叫李生。
A: 你叫李生吗?
B: 我不叫李生。