J is

well if you know our family you know the answer to that....

J....ju...ju...Jenner

It has taken quite a while for Jenner to come to accept that anything else besides himself could possible start with the wonderful letter J.  If you said generator (cause that DOES sound like the letter J) he thought you were talking about him...

He is a cute clever boy..that Jenner.....who knows he might eventually let Judge claim ownership to the letter J.