Claire and Sweet "T"

Claire calls Kate, "T" in her attempt to say Kate. She'll see her and say "Hi T" or "TEEEEEE!!!!!"
So I started calling Kate "Sweet T." Kate does not like either of these names and we've had the following conversation numerous times:

Claire: TEEEEEEE!!!!!
Kate: My name is not T, it's KATE HUTCHINSON!

Me: Baby, she's trying to say Kate, she just can't yet
Kate: Well...maybe next year she will be able to say Kate Hutchinson