Help!! Sibling name for River

Pregnant with baby number 2 yay! Too early to know sex yet. Looking for girl names to go with big sister River. Got a boy name picked already Things I liked about Rivers name : -nature inspired -gender neutral (not necessary but don’t want anything ultra girly) -easy to spell and pronounce -cute nickname (not necessary just a bonus)

Names we like thus far: Willow, Sage, June, Mabel, Winnie, Wren

We’re not afraid of unique names but don’t want to see to try hard. Plz help :)