I absolutely adore [name_f]Astrid[/name_f] its been on my list for years but a friend i absolutely love has chose it for her daughter.
I could get away with bumping it to the middle spot but im looking at names that have the same feel and have the same impact as [name_f]Astrid[/name_f] , slightly on the rarer side.
Anaïs & Ingrid sound similar.
Other ideas:
Edith
Margot
Selma
Beatrix
Tessa
Cato
Isabeau
Linnea
Ines
Saskia
Frida
Dagmar / Dagny
Clarissa
Sonya / Sonja
Lucasta
[name_f]Ingrid[/name_f] feels like the nest alternative to [name_f]Astrid[/name_f] 
I think [name_f]Ingrid[/name_f] is beautiful!
Anyways you’ve had some lovely suggestions from @heartwings so count any repeats as me being in agreement with this berry
[name_f]Flora[/name_f]
[name_u]Aster[/name_u]
[name_f]Ariadne[/name_f]
[name_f]Cordelia[/name_f]
[name_f]Greta[/name_f]
[name_f]Heidi[/name_f]
[name_f]Irene[/name_f]
[name_f]Iris[/name_f]
[name_f]Isolde[/name_f]
Agnes/Agatha
[name_f]Ione[/name_f]
[name_f]Helena[/name_f]
Ginerva
[name_f]Saskia[/name_f]
[name_f]Imogene[/name_f]
[name_f]Cassia[/name_f]
[name_f]Calliope[/name_f]
[name_f]Hope[/name_f] this helps
[name_f]Alexa[/name_f]
[name_u]Alma[/name_u]
[name_u]Angie[/name_u]
[name_f]Ariana[/name_f]
[name_f]Bridgette[/name_f]
[name_f]Camilla[/name_f]
[name_u]Dana[/name_u]
[name_f]Erika[/name_f]
[name_f]Gloria[/name_f]
[name_f]Helen[/name_f]
[name_f]Leyla[/name_f]
[name_u]Maria[/name_u]
[name_f]Rosa[/name_f]
[name_f]Sofia[/name_f]
[name_u]Alba[/name_u]
[name_f]Embla[/name_f]
[name_f]Ilaria[/name_f]
[name_f]Elara[/name_f]
[name_f]Sidony[/name_f]
[name_f]Idalia[/name_f]
Rosfrith
[name_f]Opal[/name_f]
I do like [name_f]Ingrid[/name_f] but i dont think my heart feels the same way about it as [name_f]Astrid[/name_f] 
[name_f]Selma[/name_f] reminds me of The Simpsons lol i like [name_f]Linnea[/name_f] and [name_u]Dagny[/name_u] as i know they have a scandi link.
I do keep gravitating back to [name_u]Aster[/name_u] but spelt [name_u]Asta[/name_u]. I think i just love scandi names lol i like the flow if [name_f]Ariadne[/name_f] but find it clunkish
Hmmm none of these quite hit the mark with me . Id say [name_u]Alma[/name_u] is closest
[name_f]Embla[/name_f] is cute but it reminds me of embolism
Rosfrith is interesting
[name_f]Isolde[/name_f]
[name_f]Avril[/name_f]
[name_u]Juno[/name_u]
[name_f]Svea[/name_f]
[name_f]Olive[/name_f]
[name_u]Aster[/name_u]
[name_f]Ingrid[/name_f]
[name_f]Astraea[/name_f]
[name_f]Azalea[/name_f]
Sigrid
Solveig
Frida
Agnes
Alva / Alba
Margaret / Marit / Greta
Brynja
Eira
Elsa
Lovisa
Liv
Idun
[name_f]Avril[/name_f] is a good one
Ooh, that is tough! I’m not sure any of these will live up to your beloved [name_f]Astrid[/name_f] for the moment, but perhaps in time you’ll find one that suits you.
I’ll suggest…
[name_f]Winifred[/name_f]
[name_f]Tove[/name_f]
[name_f]Margot[/name_f]
[name_m]Ase[/name_m]
[name_f]Thyra[/name_f]
Hela
[name_f]Sif[/name_f]
[name_f]Agnes[/name_f]
[name_u]Holland[/name_u]
[name_f]Brynn[/name_f]
Morfydd
Frigga
[name_f]Birdie[/name_f]
[name_f]Inga[/name_f]
[name_f]Thora[/name_f]
[name_f]Athena[/name_f]
[name_f]Freyja[/name_f]
[name_u]Artemis[/name_u]
[name_f]Ariadne[/name_f]
[name_f]Daphne[/name_f]
[name_f]Isolde[/name_f]
[name_f]Hermione[/name_f]
[name_f]Greta[/name_f]
[name_f]Estrid[/name_f]
Aldith
[name_f]Ada[/name_f]
[name_f]Imogen[/name_f]
Oh i think youve got the most of the style i was thinking of. [name_f]Tove[/name_f] /Tovie has been up and down on my list. I love [name_f]Sif[/name_f] just wish it was a little longer.
I like [name_u]Artemis[/name_u] but iv always felt it to be masculine even though i know it isnt.
I adore [name_f]Estrid[/name_f] but its so close to being the same name.
I kinda like [name_m]Ase[/name_m] but again a little more on the masculine side.
[name_u]Love[/name_u] [name_f]Hermione[/name_f] and im a potter head and that puts my husband off of it lol
Oh, grand! Perhaps you’d like a longer name with [name_f]Sif[/name_f] or [name_f]Siv[/name_f] (how the name is sometimes translated) as a nickname? [name_f]Ellisif[/name_f] (the most intuitive and classic to me), [name_f]Siobhan[/name_f], [name_f]Sophronia[/name_f], [name_f]Saffron[/name_f], [name_f]Savannah[/name_f], Siva, [name_u]Silver[/name_u], [name_f]Sylvie[/name_f], or [name_u]Shiva[/name_u] might work for you.
Fjola
[name_f]Fenja[/name_f]
[name_f]Evka[/name_f]
[name_f]Elka[/name_f]
[name_f]Duska[/name_f]
[name_f]Ludmila[/name_f]
[name_f]Greta[/name_f]
[name_f]Winifred[/name_f]
[name_f]Ida[/name_f]
[name_f]Heidi[/name_f]
[name_f]Ronja[/name_f]
[name_f]Zelda[/name_f]
[name_f]Annika[/name_f]
[name_f]Sonia[/name_f]
[name_u]Malin[/name_u]
[name_f]Danica[/name_f]
[name_f]Britta[/name_f]
[name_f]Idun[/name_f]
[name_f]Toril[/name_f]
[name_f]Agata[/name_f]
[name_f]Dahlia[/name_f]
[name_f]Carolinda[/name_f]
[name_f]Elsa[/name_f]
[name_f]Inga[/name_f]
[name_f]Marta[/name_f]
[name_f]Elin[/name_f]
[name_f]Sigrid[/name_f]
[name_f]Signy[/name_f]
[name_f]Naomi[/name_f]
[name_f]Delilah[/name_f]
[name_f]Enid[/name_f]
[name_u]Arden[/name_u]
[name_f]Avalon[/name_f]
[name_f]Althea[/name_f]
[name_f]Alodia[/name_f]
[name_f]Acadia[/name_f]
[name_f]Fernanda[/name_f]
[name_f]Solana[/name_f]
[name_f]Calla[/name_f]
[name_f]Appoline[/name_f]
[name_f]Leda[/name_f]
[name_f]Orlena[/name_f]
For me, [name_f]Petra[/name_f] has the same vibe.
Did the friend know you loved it for such a long time?
If so, there’s nothing really stopping you from choosing it.
[name_f]My[/name_f] mum always vowed that if a sibling or friend chose her long term favourite, aka my real name for a baby, there would have to be two of us.