Middle name help!

Monica • I`m a 30 year old military wife and mother to our 9 year old son, Rylan and daughter, Maci who is 4.
We love the name Karlee, but are having a hard time with middle names. We like Elaine but we have a lot of people using it already that we know an we liked Jane but my BFF is using as her daughters middle name. We aren't pg yet but hoping to be soon :) Also, our last name is Valentin (pronounced Val-en-teen.)