What is the common noun in She named her dog Max?

The common noun in the sentence "She named her dog Max" is dog.

Here's why:

* Common nouns are general names for people, places, or things.

* Proper nouns are specific names for people, places, or things.

In this sentence:

* She and Max are proper nouns (specific people).

* Dog is a common noun (general name for a type of animal).