I absolutely adore your set! So precious. I have a few ideas, but I want to second [name_f]Birdie[/name_f] in particular. [name_f]Marigold[/name_f] and [name_f]Birdie[/name_f] are both adorable, but [name_f]Birdie[/name_f] shares the short sweet, gently old fashioned vibes of your other girls.
[name_f][/name_f]Might I suggest:
[name_f][/name_f][name_f]Blythe[/name_f] [name_f][/name_f]- not a nature name, but a word name with some gentle, whispery literary vibes. And I love the carefree imagery.
[name_f][/name_f][name_f]Wren[/name_f] [name_f][/name_f]- Going along with [name_f]Birdie[/name_f], I think there are many bird names that are lovely. [name_f]Wren[/name_f] is my personal favourite for your set, but I also like [name_m]Robin[/name_m] or [name_f]Lark[/name_f].
[name_f][/name_f][name_f]Iris[/name_f] [name_f][/name_f]- I also like [name_f]Hazel[/name_f] for you, but [name_f]Iris[/name_f] feels slightly more distinctive while still fitting in with the sister names. I love how it references both the flower and rainbows [name_f][/name_f]- two nature names in one! Similar name [name_f]Ivy[/name_f] might also strike your fancy?
[name_f][/name_f][name_f]Eve[/name_f] [name_f][/name_f]- [name_f]Eve[/name_f] is so trim and underrated, and I think people forget that she’s a nature/time name in her own right. I think she matches your other babies’ “why didn’t I think of that” blend of surprising but familiar. [name_f]Olive[/name_f] and [name_f]Eve[/name_f] do sound a bit similar [name_f][/name_f]- I think they’re distinctive enough to work as sisters, but your mileage may vary on that.
[name_f][/name_f]I also looked at the nature names lists here and on britishbabynames for ideas [name_f][/name_f]- that might be a good place to poke around if you haven’t already.