I really like Linnea! I had a beautiful book called Linnea’s Almanac as a kid which was all about nature and the seasons, so I think of that - a happy-go-lucky, curious, kind little girl collecting leaves and making projects. The colour palette of the book was very natural and charming, all greens and neutrals, so it seems like a calm and reflective name to me. Linnea is also very elegant for an adult, it’s got a lovely cadence to it with fun nickname Lin. I’d pronounce it lin-AY-uh 
For middles, maybe…
Linnea Birdie
Linnea June
Linnea Marigold
Linnea Sophie
Linnea Hero
Linnea Catrinel
Linnea Juliet
Linnea Kate
Linnea Fawn
Linnea Sibyl
Linnea Winnet
For sibs, maybe…
Aurora
Blythe
Daphne
Flora
Hazel
Ianthe
Maelie
Olivet
Sylvie
Verena
Ambrose
August
Cosmo
Florian
Jasper
Meridian
Orion
Peregrine
Sylvan
Valentine
edit: link didn’t work