Genesis 2:18 - 19
ESV - 18 Then the Lord God said, "It is not good that the man should be alone; I will make him a helper fit for him. 19 Now out of the ground the Lord God had formed every beast of the field and every bird of the heavens and brought them to the man to see what he would call them. And whatever the man called every living creature, that was its name.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.