Hugest congratulations 
Absolutely love your kiddos names! I also love your list so many beauties.
My thoughts
[name_m]Finbar[/name_m] ~ I think [name_m]Finbar[/name_m] is a fun creative choice that I think fits nicely in with your sibling set. I also love the nickname [name_m]Finn[/name_m] but maybe this nickname is a little too close to [name_m]Zin[/name_m].
Raffidy ~ I prefer [name_m]Rafferty[/name_m] I’m not keen on the sharpness off the d within this name.
[name_m]Amos[/name_m] ~ I think he’s a lovely vintage gentlemanly choice that feels soft and gentle. But I do think [name_m]Amos[/name_m] lacks the spark of your older kids names.
[name_m]Silas[/name_m] ~ similar feedback too [name_m]Amos[/name_m]. [name_f]Lovely[/name_f] choice but just not as cool as your older kids names.
[name_m]Magnus[/name_m] ~ I think this name is the champion for me. [name_m]Magnus[/name_m] just has this lofty distinguished cool guy flair that is perfection with your kiddos and the nickname [name_m]Gus[/name_m] is adorable.
Suggestions: [name_m]Atlas[/name_m], [name_m]Cassius[/name_m], [name_m]Caspian[/name_m], [name_m]Casimir[/name_m], [name_m]Evander[/name_m], [name_f]Aquila[/name_f], [name_m]Elias[/name_m], [name_m]Aries[/name_m], [name_m]Mathias[/name_m], [name_m]Moses[/name_m], [name_m]Osiris[/name_m], [name_m]Ozias[/name_m], [name_m]Stellan[/name_m], [name_m]Florian[/name_m], [name_m]Pascoe[/name_m], [name_m]Joss[/name_m], [name_m]Apollo[/name_m], [name_f]Marlow[/name_f], [name_m]Quinlan[/name_m], [name_m]Orson[/name_m], [name_m]Rhodes[/name_m] + [name_m]Willis[/name_m].
[name_f]Marit[/name_f] ~ this is my first time encountering [name_f]Marit[/name_f] and I can see the appeal she’s sleek, understated and polished however I also find her a little sharp maybe too sharp next too your more romantic kiddos.
[name_f]Flora[/name_f] ~ oh gosh I love [name_f]Flora[/name_f]! She’s a firm favourite of mine I think she’s beautiful springtime choice packed with charm. [name_f]Beautiful[/name_f] name. However I do like how distinct each name each and maybe [name_f]Flora[/name_f] after a flower name lacks that distinction which makes your sibling set cool.
[name_f]Willa[/name_f] ~ spunky, eclectic name oozing cool girl energy that definitely is a berry favourite however [name_f]Willa[/name_f] lacks the romance of your sibling set so isn’t my favourite choice for you.
[name_f]Leonora[/name_f] ~ absolutely love [name_f]Leonora[/name_f] honestly I think she’s perfection I would use upfront if it wasn’t for my daughter being [name_f]Lilia[/name_f] to many L’s and A’s for me. Anyways this isn’t an issue for you and I think [name_f]Leonora[/name_f] is beautiful, majestic, romantic and just gorgeous packed with cool nickname options. [name_f]Love[/name_f]! I think [name_f]Leonora[/name_f] works for your sibling set as well.
[name_f]Inez[/name_f] ~ I think [name_f]Inez[/name_f] is lovely she’s polished, elegant, looks fun with that Z ending and I think she would feel rather effortless in your sibling set. I also like how distinct [name_f]Inez[/name_f] is with own individual ending which I feel is part of the appeal within your sibling set. I think this name is so aesthetically on brand for you guys honestly. For me it’s between [name_f]Leonora[/name_f] + [name_f]Inez[/name_f] for your sibling set.
Suggestions: [name_f]Delphi[/name_f], [name_f]Capri[/name_f], [name_f]Tallulah[/name_f], [name_f]Juliet[/name_f], [name_f]Marlow[/name_f], [name_f]Elspeth[/name_f], [name_f]Selene[/name_f], [name_f]Blythe[/name_f], [name_f]Astrid[/name_f], [name_f]Ingrid[/name_f], [name_f]Opal[/name_f], [name_f]Pearl[/name_f], [name_f]Seren[/name_f], [name_f]Heidi[/name_f], [name_f]Amelie[/name_f], [name_f]Noemi[/name_f], [name_f]Eleri[/name_f], [name_f]Anouk[/name_f], [name_f]Coralie[/name_f], [name_f]Daphne[/name_f], [name_f]Charis[/name_f] + [name_f]Avalon[/name_f].
[name_f]Hope[/name_f] this helps