Tibert the renamed cat

We went to a friends house so the kids could play. They had a new cat named Max. Kaytlynn was paying a lot of attention to the cat, or "catty", so I asked her if she knew the cats name. She said "Tibert". I told her that the cats name was Max. Kaytlynn called that cat Tibert the rest the time. "Tum here, Tibert." "Where'd you doe, Tibert?" "Tibert eat my bot-tle." Aidan, the cats 3 year old owner, told Kaytlynn "His name is not Tibert. His name is Max." Kaytlynn just looked at him like he was crazy, like she does--ignored him, turned around and ran down the hall looking for the cat-"Here, Tibert!" It totally cracked me up. Tibert. Hm. Where did she come up with that name?