Mackenzie- who knows, I guess we just liked the name... =P

Muffin- Once we decided to adopt her and she wasn't responding to the name "Lolly", we were just calling out random names to her... and when we shouted, "Muffin," she immediately turned and ran to us.

Zeus- I wanted a name that would match his I'm-tough-even-though-I'm-the-littlest-dog-in-the-family attitude. =P (He's the alpha of our dogs... hah)