Don't you dare change that name. Arabella Grace is perfect and fits in nicely with your other childrens names. Leslie is horrible and near as classy or beautiful as Arabella. Tell your MIL to get over it, she's your child not hers and if she wanted a Leslie she should have used it on her own children.

On your questions.
Do I like the names for your current kids? I would have to say no. Thankfully you do, so my opinion really doesn't matter. Do I like the name you plan to name your pending arrival? No, but again, I'm glad you like it. Do I think you should change Arabella to Leslie to appease your pain in the butt devil mother in law, no, because she can either live with it or not come over and enjoy her grandkids. just my couple of cents.

1) what should i do? You should stick to your guns. It is up to you and your husband what you name your childeren and no one else.
2) what do you think of our childrens names?
Kohan Joseph --- I like it
Peightyn Brianne --- I like it, but I prefer the spelling Peyton
Arabella Grace --- love it

This is an issue very close to my heart.

Your mother in law is soo fortunate that you have chosen such a classy, beautiful, gracious name, like Arabella Grace.
Love Arabella Grace.

- Genevra

Your mother in law is not pregnant, you are. Don't let her opinion influence you. But please think of your child. When they grow up will they be overly teased? What I mean is don't be like the celebs and name your kid Apple or Audio Science.

yes, but Arabella Grace is from an entirely different category, than Apple, Audio....

Arabella is a beautiful name, and she will not be teased with a name like Arabella.

- Genevra