Middle name help!

My hubby and I are having a baby girl and decided to name her Holly Elizabeth. But we are having trouble with the second middle name.

Backstory - my parents decided to be different and give their children two middle names, not sure why. So we decided to try and make it a tradition lol.

Personally, I love Grace for a second one, but it's my sister's middle name and let's just say she isn't our favorite person. We want something simple and sweet, but can't seem to agree on anything lol.

Any ideas?