help! name help

help! we already know what we are naming our baby girl and have known since I found out I was pregnant 32 weeks ago. But, we've run into a small problem. my oldest daughters name is Emmalee, and my 2 year old son calls her "malee." here is the problem. we want to name baby girl Amelia and call her Millie... which I guess could sound very close to Emmalee... 😫 help! what do I do? I LOVE the name, but don't want my girls hating the fact that their names sound alike.