Hello!
Thank you for all the great feedback on the spelling for Reyna! I think I am leaning toward that spelling right now, although Raina is still a contender. (Nicknames are the tricky piece. Reyna lends itself to Rey, and Raina to Rain or Raine.) All hypothetical at this point, but it feels great to have some more solid options on my list.
Anyway… now I am looking at potential sibsets. Reyna has great imagery imo - feminine but strong. And I am hoping to come up with sister names that have a similar vibe. I do not want the name to be frilly, but a lot of names I am trying seem too plain next to Reyna. I want some spunk 
For some reason, the poll did not work. So, here are my ideas -
Reyna & Naomi
Reyna & Jade
Reyna & Halle
Reyna & Phoebe
Reyna & Grace
Reyna & Margo
Any others? Thank you!
I love your list of potential sister names! My two favorites would be [name_f]Grace[/name_f] and [name_f]Margo[/name_f], they both compliment [name_f]Reyna[/name_f] in such different ways. I would also love to suggest:
[name_f]Reyna[/name_f] and [name_f]Bel/name_f
[name_f]Reyna[/name_f] and [name_f]Sommer[/name_f]
[name_f]Reyna[/name_f] and [name_f]Josephine[/name_f]/[name_u]Josie[/name_u]
[name_f]Reyna[/name_f] and [name_u]Bryn[/name_u]
[name_f]Reyna[/name_f] and [name_f]Tess[/name_f]
[name_f]Reyna[/name_f] and [name_u]Avery[/name_u]
[name_f]Margo[/name_f] goes perfectly with [name_f]Reyna[/name_f].
Ideas:
[name_f]Reyna[/name_f] & [name_f]Clio[/name_f]
[name_f]Reyna[/name_f] & [name_f]Judith[/name_f]
[name_f]Reyna[/name_f] & [name_f]Pearl[/name_f]
[name_f]Reyna[/name_f] & [name_f]Agnes[/name_f]
[name_f]Reyna[/name_f] & [name_f]Avril[/name_f]
[name_f]Reyna[/name_f] & [name_f]Adele[/name_f]
[name_f]Reyna[/name_f] & [name_f]Laurel[/name_f]
[name_f]Reyna[/name_f] & [name_u]June[/name_u]
[name_f]Reyna[/name_f] & [name_f]Harlow[/name_f]
[name_f]Reyna[/name_f] & [name_f]Gwen[/name_f]
[name_f]Reyna[/name_f] & [name_f]Gladys[/name_f]
[name_f]Reyna[/name_f] & [name_u]Simone[/name_u]
[name_f]Reyna[/name_f] & [name_u]Josie[/name_u]
[name_f]Reyna[/name_f] & [name_f]Sylvie[/name_f]
[name_f]Reyna[/name_f] & [name_f]Sybil[/name_f]
[name_f]Reyna[/name_f] & [name_u]Sage[/name_u]
[name_f]Reyna[/name_f] & [name_u]Joyce[/name_u]
[name_f]Reyna[/name_f] & [name_f]Maris[/name_f]
[name_f]Reyna[/name_f] & [name_f]Polly[/name_f]
[name_f]Reyna[/name_f] & [name_u]Paris[/name_u]
[name_f]Reyna[/name_f] & [name_f]Olive[/name_f]
[name_f]Reyna[/name_f] & [name_f]Joelle[/name_f]
[name_f]Reyna[/name_f] & [name_f]Neve[/name_f]
[name_f]Reyna[/name_f] & [name_f]Coral[/name_f]
[name_f]Reyna[/name_f] & [name_f]Maren[/name_f]
[name_f]Reyna[/name_f] & [name_f]Marie[/name_f]
[name_f]Reyna[/name_f] & Luelle
[name_f]Reyna[/name_f] & [name_f]Liv[/name_f]
[name_f]Reyna[/name_f] & [name_f]Lizzy[/name_f] / [name_f]Lizzie[/name_f]
[name_f]Reyna[/name_f] & [name_u]Lyric[/name_u]
[name_f]Reyna[/name_f] & [name_u]Laurie[/name_u]
[name_f]Reyna[/name_f] & [name_f]Lorelei[/name_f]
[name_f]Reyna[/name_f] & [name_f]Louise[/name_f]
[name_f]Reyna[/name_f] & [name_f]Lois[/name_f]
[name_f]Reyna[/name_f] & [name_f]Janice[/name_f]
[name_f]Reyna[/name_f] & [name_u]Fallon[/name_u]
[name_f]Reyna[/name_f] & [name_f]Iris[/name_f]
[name_f]Reyna[/name_f] & [name_f]Imogen[/name_f]
[name_f]Reyna[/name_f] & [name_f]Ingrid[/name_f]
[name_f]Reyna[/name_f] & [name_u]Hollis[/name_u]
[name_f]Reyna[/name_f] & [name_f]Heidi[/name_f]
[name_f]Reyna[/name_f] & [name_f]Jewel[/name_f]
Why not the proper Spanish spelling which means queen? It would be [name_f]Reina[/name_f] 
@ihughes - I do love the meaning, but worry that the pronunciation would be unclear (at least where I live). I am usually not a fan of kreativ spellings, but in the US, [name_f]Reyna[/name_f]/[name_f]Rayna[/name_f]/[name_f]Raina[/name_f] are all recognized spellings. And as I mentioned, nicknames are important to me, and [name_f]Reyna[/name_f] is a clearer path to [name_u]Rey[/name_u]. Thank you for the note though! I agree that [name_f]Reina[/name_f] is beautiful on paper!
Any thoughts on sibling names? Thank you 
@kathryn2313 - Thanks! [name_f]Belle[/name_f] and [name_f]Summer[/name_f] are great! [name_u]Love[/name_u] the positive and spunky vibe. I also love [name_u]Bryn[/name_u] and [name_u]Avery[/name_u]… the y connection with [name_f]Reyna[/name_f] is really nice.
@ashleyjuliette – Wow! That is a fantastic list. I love a lot of those names. [name_u]June[/name_u], [name_f]Gwen[/name_f], [name_u]Simone[/name_u], [name_u]Sage[/name_u], [name_f]Maris[/name_f], [name_f]Maren[/name_f], [name_f]Joelle[/name_f], [name_f]Liv[/name_f]… All so pretty. Thank you!
I love [name_f]Reyna[/name_f] and [name_f]Margo[/name_f] as a sibset! It’s got a fun and strong sass to it.
Sorry for any repeats…
[name_f]Astrid[/name_f]
[name_f]Hazel[/name_f]
[name_f]Marnie[/name_f]
[name_f]Edie[/name_f]
[name_f]Stella[/name_f]
[name_f]Tess[/name_f]
[name_f]Estelle[/name_f]
[name_f]Lydie[/name_f]
[name_f]Ivy[/name_f]
[name_f]Lola[/name_f]
[name_f]Marta[/name_f]
[name_f]Lucy[/name_f]
[name_f]Zara[/name_f]
[name_u]Mattie[/name_u]
I do love [name_f]Reyna[/name_f]! I have it on my girls list too (spelled [name_f]Raina[/name_f]). [name_u]Love[/name_u] the nickname [name_u]Rain[/name_u].
My favourite of yours is [name_f]Reyna[/name_f] and [name_f]Jade[/name_f]. So beautiful and natural, the rain and the gem. I love [name_f]Jade[/name_f].
For some reason, the perfect sister name for [name_f]Reyna[/name_f] for me is [name_f]Kaia[/name_f]/[name_f]Kaya[/name_f]. Another one of my favourites with [name_f]Reyna[/name_f], but it’s getting a little popular, is [name_f]Aurora[/name_f]. And maybe-
[name_f]Reyna[/name_f] & [name_u]Shiloh[/name_u]
[name_f]Reyna[/name_f] & [name_u]Zion[/name_u]
[name_f]Reyna[/name_f] & [name_f]Liberty[/name_f]
[name_f]Reyna[/name_f] & [name_u]Eden[/name_u]
[name_f]Reyna[/name_f] & [name_f]Olwen[/name_f]
[name_f]Reyna[/name_f] & [name_f]Saffron[/name_f]
[name_f]Reyna[/name_f] & [name_u]Willoughby[/name_u]
[name_f]Reyna[/name_f] & [name_f]Phaedra[/name_f]
[name_f]Reyna[/name_f] & [name_f]Nuala[/name_f]
[name_f]Reyna[/name_f] & [name_u]Zola[/name_u]/[name_f]Zora[/name_f]
[name_f]Reyna[/name_f] & [name_f]Emerald[/name_f]
All the best.