Boy names: Asa, Edward/Edwin, Evander, Orik, Orion, Zoran, Zen, Zion Azarius, Avon, Dominic, Emeric, Eric, Ethan, Everett, Irwin, Ivan, Jack, Max, Zander, Zoren, Mika, Michael, Ollivander, Oscar, Oswin, Oswald, Otto, Ozias, Vanir, Varian, Salazar, Robert, Jasper
Nature (girls and boys mixed):
Lorelei, Alouette, Opal, Rain, River, Sky/Skye, Isle, Iris, Ivy, Mapel, Juniper, Lotus, Forest, Robin, Avalyn, Rosalie/Rosalind/Rosaline, Primrose, Willow, Meadow, Tundra, Everest, Denali, Yukon, Frost, Foxglove, Fox, Nightingale, Wolf, Falcon, Peregrine, Eagle, Cardinal, Lavendar, Indigo, Lyon, Lupine, Mantis, Crane, Oak, Sycamour, Clover, Basil, Albatross, Canary, Azalea, Onyx, Ruby, Saphira, Sakura, Esmeralda/Emerald, Pine, Persia, Paris, London, Quill, Wren, Rye, Sylvan, Thorn, Zephyr, Auster, Lynx, Kit, Cyprus, Violet, Scarlett, Sparrow, Sierra, Sequoya, Raven, Olive, Nymph, Magnolia, Marigold, Rosemary, Fern, Laurel, Amethyst, Jay, Lunaria, Linaria, Saponaria, Sororia, Jasmine, Florence, Flora, Fiora, Hyacinth, Iris, Ambrosia, Hibiscus, Hydrangea, Hortensia, Aleron, Adler, Aquilla, Altair, Oriel, Gazelle, Aquata, Azula, Arcadia, Coral/Coraline, Dawn, Delphi, Sage, Lark, Hazel, Lachland
Girl names:
Sonata, Arianna, Aria, Viola, Elodie, Melody, Ariel, Isadora, Arabelle, Cosette, Odette, Danielle, Arlette, Colette, Charlotte, Song, Avabelle, Adelia, Cordelia, Cornelia, Amelia, Natalia, Sienna, Catalina, Evelyn, Selina, Victoria, Caroline, Alice, Lucy, Eden, Mary, Betsy, Maud, Edith, Margaret, Agnes, Greta, Rey, Ada, Ida, Martha
I would also suggest looking at these threads for nature ideas.