Boys nature/earthy/elements

[Hulaballoo]

Struggling for hippie request boy nature names. I have 2 girls both have nature names so looking for something to fit with theirs... Lots of people have suggested Oak but I don't really like it... Any ideas?

Bryn
Glyn
Craig
Dale
Glenn
Ben
Storm
Cliff
Forrest
River
Eagle
Wolf
Fox
Todd
Kite
Kes
Bear
Arthur
Trevor
Llew

Oakley
Derwent
Basil
Bruno

Rio (river in Spanish)
Sol (sun in Spanish)
Fin
Florian
Leon (lion in Spanish)