If you really move frequently, internationally, then longer word-names will be a headache and a hassle. I agree too that most of your combinations are on the wrong side of whimsical.
[name]Isla[/name], of your choices, pairs the best-- by far-- with Hendrickson. If mixing and matching, I’d use [name]Isla[/name] [name]Gray[/name] Hendrickson: short, sunny and sweet first name (which, after all, comes from the word ‘island,’ so is a word-name); monosyllabic middle, and the long, full-of-consonant-sounds Hendrickson to finish. You’d have a 2-1-3 syllabic flow and a nice balance of imagery.
As for your other choices:
[name]Everly[/name] is not a real adverb, it’s a 70s band;
[name]Boheme[/name] is not bohemian, it’s trying too hard, and it will be mispronounced most places;
[name]Viviana[/name] is beautiful, distinctive, and lovely, but a 4-syllable first name is just too much with Hendrickson. [name]Vivian[/name] won’t work due to the rhyme-y -an ending sound that would be shared with Hendrickson. [name]Vita[/name] / [name]Viva[/name] would be great though! Lively, sweet, short, distinctive, and easy to say/spell/pronounce in many languages and cultures.
Rejn: ?que? [name]Rain[/name]? Rein? [name]Reina[/name]? This will be hopelessly bungled, and it looks too trendy.
[name]Jolie[/name]: will be flat-out laughed at in [name]France[/name], as would be a girl named Pretty here.
[name]Reverie[/name]: a pretty word-name, but it will lose its meaning in an international context, and it’s a bit insubstantial for a name. It’s basically ‘daydream.’
[name]Jade[/name]: this has gone downmarket to stripper territory in the last decade. [name]Don[/name]'t believe me? google it. You’ll get Chinese restaurants and escort services.
[name]Serenity[/name]: [name]Sailor[/name] [name]Moon[/name]. Would go for [name]Serena[/name]-- dignified, smooth, saintly, sporty [name]Serena[/name].
[name]Gray[/name]: doesn’t do too much for me. It seems like a filler. Is there anything about the color gray that you’d like your daughter to be associated with?
Suggestions, for first and middles with a bohemian vibe:
[name]Bay[/name]
[name]Flora[/name] (goddess of flowers & plants)
[name]Junia[/name] ([name]June[/name], [name]Juno[/name])
[name]Lark[/name] (bird)
[name]Perla[/name] (pearl)
[name]Vale[/name] (valley)
[name]Estelle[/name] (star)
[name]Honor[/name] (seconding)
[name]Alba[/name] (white, sacred)
[name]Aura[/name] (aura)
[name]Cassia[/name] (cinnamon)
[name]Laurel[/name]
[name]Hope[/name]
[name]Lucia[/name] (light, very very international)
[name]Merrill[/name] (blackbird)
[name]Oriel[/name] (oriole)
[name]Aurea[/name] (gold)
[name]Cassia[/name] [name]Bay[/name] Hendrickson
[name]Aurea[/name] [name]Vale[/name] Hendrickson
[name]Flora[/name] [name]June[/name] Hendrickson
[name]Viva[/name] [name]Estella[/name] Hendrickson
[name]Honor[/name] [name]Oriel[/name] Hendrickson
etc