I love [name_f]Cordelia[/name_f] and [name_f]Marigold[/name_f] for you. For a boy I really gravitate to [name_u]Max[/name_u]!
Leon [name_f]Scarlett[/name_f] and [name_u]Max[/name_u]
[name_m]Leon[/name_m] [name_m]Alexander[/name_m] , [name_f]Scarlett[/name_f] [name_f]Victoria[/name_f] and [name_m]Maxim[/name_m] [name_m]Henry[/name_m]
For girls I will suggest:
[name_f]Mathilde[/name_f] , [name_f]Elke[/name_f] , [name_f]Sabine[/name_f]
I really like [name_m]Bjorn[/name_m] and [name_f]Marigold[/name_f]. So sweet!
In terms of a pattern, I think you should choose a name you love and if it happens to fall into a pattern than that’s a bonus. That said, [name_f]Lauren[/name_f] and [name_m]Leon[/name_m] sounds very similar.
What about these L names for girls?
[name_f]Liv[/name_f], [name_f]Laurel[/name_f], [name_u]Lark[/name_u], [name_f]Liesl[/name_f], [name_f]Lourdes[/name_f], [name_m]Lowell[/name_m], [name_f]Lillian[/name_f]
Or some [name_m]German[/name_m] S names for boys:
[name_m]Selik[/name_m], Spangler, Schaeffer, Saelac
More nice [name_m]German[/name_m] boy names:
[name_u]Everett[/name_u] (strong wild boar), [name_m]Gunther[/name_m], [name_m]Rainor[/name_m], [name_m]Rudolf[/name_m]/Rudy (wolf), [name_m]Franz[/name_m], [name_m]Winfield[/name_m], [name_u]Barret[/name_u] (brave as a bear), [name_m]Brock[/name_m] (badger), [name_m]Roswell[/name_m] (mighty horseman), [name_m]Meyer[/name_m] (farmer), [name_m]Wolfric[/name_m] (wolf ruler), [name_m]Otto[/name_m]
Some suggestions for a baby girl:
[name_f]Hazel[/name_f], [name_f]Clementine[/name_f], [name_f]Sienna[/name_f], [name_f]Amaryllis[/name_f], [name_f]Magnolia[/name_f], [name_f]Lilac[/name_f], [name_u]Juniper[/name_u], [name_f]Rosemary[/name_f], [name_f]Primrose[/name_f], [name_f]Leonora[/name_f], [name_f]Fern[/name_f], [name_f]Zinnia[/name_f], [name_f]Georgia[/name_f].
Spain, it’s just that sounds a little weird to me
The more I think about it that more I love [name_m]Moritz[/name_m], it’s going to my list 
Thank you for a thoughtful response!
Oh wow, thank you! I didn’t even know about many of these names - there are some great choices in what you have suggested🌹
Any chance you possess the same sort of list for [name_m]German[/name_m] girl names?
I used the male version of this list and thought the addition of meanings was really helpful: Germany 101 | German Girl Names, German Girls Names, German Baby Girls Names, German Names for Girls and their Meanings
(I-Z names are there, you have to click the little link under the list)
Good luck!
Some suggestions for a girl (mostly):
[name_m]Leon[/name_m], [name_f]Scarlett[/name_f] & [name_u]Juniper[/name_u]
[name_m]Leon[/name_m], [name_f]Scarlett[/name_f] & [name_u]Arden[/name_u]
[name_m]Leon[/name_m], [name_f]Scarlett[/name_f] & [name_u]Brook[/name_u] / Brooke
[name_m]Leon[/name_m], [name_f]Scarlett[/name_f] & [name_f]Zinnia[/name_f] (sorry, ends in a vowel)
[name_m]Leon[/name_m], [name_f]Scarlett[/name_f] & [name_f]Iris[/name_f]
[name_m]Leon[/name_m], [name_f]Scarlett[/name_f] & [name_f]Violet[/name_f]
[name_m]Leon[/name_m], [name_f]Scarlett[/name_f] & [name_u]Tempest[/name_u]
[name_m]Leon[/name_m], [name_f]Scarlett[/name_f] & [name_f]Autumn[/name_f]
[name_m]Leon[/name_m], [name_f]Scarlett[/name_f] & [name_u]Arlo[/name_u] (either boy or girl)
[name_m]Leon[/name_m], [name_f]Scarlett[/name_f] & [name_u]Cadence[/name_u] (also ends in a vowel though)
Leon, Scarlett & Margot
I think both [name_u]Finn[/name_u] and [name_f]Marigold[/name_f] fit really well with your other childrens’ names.
I would also like to suggest:
Violet
[name_m]Hugo[/name_m]
As options which you might like based on your style.
Good luck with your choice!
Leo [name_m]Alexander[/name_m], [name_f]Scarlett[/name_f] [name_f]Victoria[/name_f], and…
[name_m]Nicholas[/name_m] [name_m]Jack[/name_m]
[name_m]William[/name_m] [name_m]Caleb[/name_m]
[name_m]Charles[/name_m] [name_m]Hugo[/name_m]
[name_m]Daniel[/name_m] [name_m]Lorenz[/name_m]
[name_m]Edward[/name_m] [name_m]Moritz[/name_m]
[name_m]Oscar[/name_m] [name_u]Theo[/name_u]
[name_m]Ragnar[/name_m] [name_u]Wyatt[/name_u]
[name_u]Finn[/name_u] [name_m]Nathaniel[/name_m]
[name_u]James[/name_u] [name_u]Finn[/name_u]
[name_f]Lily[/name_f] [name_u]Gray[/name_u]
[name_f]Cordelia[/name_f] [name_u]Harper[/name_u]
[name_f]Olivia[/name_f] [name_f]Iris[/name_f]
[name_f]Delilah[/name_f] [name_f]Lucy[/name_f]
[name_f]Eleanor[/name_f] [name_f]Olive[/name_f]
[name_f]Juliet[/name_f] [name_f]Poppy[/name_f]
[name_f]Marigold[/name_f] [name_u]Ruby[/name_u]
[name_f]Alice[/name_f] [name_u]Willow[/name_u]
[name_f]Hazel[/name_f] [name_f]Josephine[/name_f]
[name_f]Isla[/name_f] [name_f]Marigold[/name_f]
[name_u]Piper[/name_u] [name_f]Amelia[/name_f]
[name_f]Violet[/name_f] [name_f]Cordelia[/name_f]
[name_f]Grace[/name_f] [name_f]Elizabeth[/name_f]
[name_u]Quinn[/name_u] [name_u]Gray[/name_u]
[name_f]Rose[/name_f] [name_u]Harper[/name_u]
[name_u]Wren[/name_u] [name_f]Iris[/name_f]
I really struggle to see [name_f]Marigold[/name_f] on a person… I like [name_f]Margaux[/name_f] though!
Some of my favourite [name_m]German[/name_m] girls names are:
[name_f]Elke[/name_f] (pronounced [name_f]Elka[/name_f])
[name_f]Elsa[/name_f]
[name_f]Erika[/name_f]
[name_f]Gisela[/name_f]
[name_f]Heidi[/name_f]
[name_f]Henrietta[/name_f]
[name_f]Ingrid[/name_f]
[name_f]Anja[/name_f]
[name_f]Petra[/name_f]
[name_f]Zelda[/name_f]
For a boy I feel like [name_m]Hugo[/name_m] would work well with your sibset. Or Bruin if you were feeling more daring (it means brown bear so it ticks two of your boxes).
I personally encourage giving children in the same family their own initials. It helps keep things simple in the future when filling out forms for school or dividing up the mail etc!
From your list, I’d go with either [name_m]Oscar[/name_m] or [name_f]Marigold[/name_f].