Boys names

Our family has a sixth member arriving in the spring in my favourite month of October!( spring here in Aus). We don't know if our new baby will be a boy or girl so are looking at names for both. We would like a name that works well with the other names in the family. We are Brenten & Sarah and the kids are Reuben, Micah and Charlotte. We all have a unique consonant as first letter, a nature element in either the middle or first name, and each is two syllables. Our last is a short sweet single syllable. We like names with a good energetic feel and slightly prefer unpopular but will still happily choose a popular name if we like it best. Positive names with nice flow and within our own English speaking culture appeal to us.