What's in a name?

Just one week after Kellan actually started acknowledging my existence (verbally anyway), he has already changed my name. I am now "Ahma" and Nic has suddenly become "Addie". His favourite stuffed dog, Roger, previously "Puppo", is now "Oppo". I have no idea why he has decided to drop the first letter in these three names. He hasn't shortened any other words or names, just the three of us. And, yes, Roger ranks up there as a member of the family. What a silly boy!