We are expecting a baby girl and decided [name_f]Kadence[/name_f] as her first name. And we are thinking of getting a [name_m]German[/name_m] middle name as her grandparents were from [name_m]German[/name_m] origin. Any good suggestions?
[name_f]Elsa[/name_f]
[name_f]Greta[/name_f] / [name_f]Gretel[/name_f]
[name_f]Lorelei[/name_f]
[name_f]Heidi[/name_f]
[name_f]Katrine[/name_f]
[name_f]Erika[/name_f]
[name_f]Liesel[/name_f]
[name_f]Gertrude[/name_f]
[name_f]Aloysia[/name_f]
[name_f]Hannelore[/name_f]
[name_f]Sabine[/name_f]
[name_f]Mieke[/name_f]
[name_f]Mathilde[/name_f]
[name_f]Frieda[/name_f]
[name_f]Petra[/name_f]
[name_f]Zilke[/name_f]
[name_f]Lotte[/name_f]
[name_f]Ida[/name_f]
[name_f]Therese[/name_f]
[name_f]Annika[/name_f]
Finja ([name_m]Fin[/name_m]-ya)
[name_f]Klara[/name_f]
[name_f]Jette[/name_f]
[name_f]Rosalinde[/name_f]
[name_f]Minna[/name_f]
[name_f]Magdalena[/name_f]
For what it is worth, I prefer [name_f]Cadence[/name_f] spelled with a C. When the name is a word, changing the spelling can create difficulties - she’ll be forever saying “[name_f]Kadence[/name_f] - with a K”. Plus [name_m]German[/name_m] is an awesome language for a “K” name - so you could get a lot of K with the middle name 
[name_m]Hi[/name_m]! I love that you want to honor the [name_m]German[/name_m] origin of your family! I’m from Germany, so I really love, that someone here is asking for [name_m]German[/name_m] names.
[name_f]Alexandra[/name_f]
[name_f]Anneli[/name_f]
[name_f]Elisabeth[/name_f]
[name_f]Hannah[/name_f]
[name_f]Helene[/name_f]
[name_f]Jana[/name_f]
[name_f]Johanna[/name_f]
[name_f]Julia[/name_f]
[name_f]Laurena[/name_f]
[name_f]Lena[/name_f]
[name_f]Leonie[/name_f]
[name_f]Mareike[/name_f]
[name_f]Miriam[/name_f]
[name_u]Simone[/name_u]
[name_f]Yvonne[/name_f]
I think my favorites for you would be [name_f]Helene[/name_f], [name_f]Johanna[/name_f] and [name_f]Julia[/name_f]. If you have any questions regarding [name_m]German[/name_m] names (like pronunciation etc.) feel free to pm me 
Here are some suggestions. I’m not sure how common any of them are in Germany/if they’re still being used today though.
[name_f]Elke[/name_f]
[name_f]Ilsa[/name_f]
[name_f]Ilona[/name_f]
[name_f]Mitzi[/name_f]
[name_f]Janina[/name_f]
[name_f]Carolin/name_f
[name_f]Rosalinde[/name_f]
[name_f]Rosamunde[/name_f]
[name_f]Vreni[/name_f]
Liselott(e)
[name_f]Marlene[/name_f]/[name_f]Marlena[/name_f]
[name_f]Kadence[/name_f] [name_f]Amalia[/name_f] would be my choice.
[name_f]Kadence[/name_f] [name_f]Maria[/name_f]
[name_f]Kadence[/name_f] [name_f]Anna[/name_f]
[name_f]Kadence[/name_f] [name_f]Elisabeth[/name_f] (e-LEE-zah-bet)
[name_f]Kadence[/name_f] [name_f]Alina[/name_f]
[name_f]Kadence[/name_f] [name_f]Lena[/name_f]
[name_f]Kadence[/name_f] [name_f]Leonie[/name_f]
[name_f]Kadence[/name_f] [name_f]Lili[/name_f]
[name_f]Kadence[/name_f] Finja (FIN-yah)
[name_f]Kadence[/name_f] [name_f]Maja[/name_f] (MAH-yah)
[name_f]Kadence[/name_f] [name_f]Paula[/name_f] (POW-lah)
[name_f]Kadence[/name_f] [name_f]Frieda[/name_f]
[name_f]Kadence[/name_f] [name_f]Franziska[/name_f]
I like [name_f]Louisa[/name_f] and [name_f]Marta[/name_f]. If you’re at a loss for [name_m]German[/name_m] names, you can watch The Sound of [name_f]Music[/name_f], it has plenty :P.
[name_f]Kadence[/name_f] Anje? Pronounced [name_f]Anya[/name_f].
Taken from: German Names - The comprehensive site for German name pronunciation
It has a [name_m]German[/name_m] pronunciation guide if you’re interested. I left out some names that have been suggested already.
[name_f]Kadence[/name_f] [name_f]Alina[/name_f]
[name_f]Kadence[/name_f] [name_f]Annika[/name_f]
[name_f]Kadence[/name_f] [name_f]Anya[/name_f]
[name_f]Kadence[/name_f] [name_f]Anneliese[/name_f]
[name_f]Kadence[/name_f] [name_f]Brigitte[/name_f]
[name_f]Kadence[/name_f] [name_f]Caroline[/name_f]
[name_f]Kadence[/name_f] [name_f]Charlotte[/name_f]
[name_f]Kadence[/name_f] [name_f]Corinna[/name_f]
[name_f]Kadence[/name_f] [name_f]Dagmar[/name_f]
[name_f]Kadence[/name_f] [name_f]Emilia[/name_f]
[name_f]Kadence[/name_f] [name_f]Emilie[/name_f]
[name_f]Kadence[/name_f] [name_f]Elke[/name_f]
[name_f]Kadence[/name_f] [name_f]Edda[/name_f]
[name_f]Kadence[/name_f] [name_u]Gabriele[/name_u]
[name_f]Kadence[/name_f] [name_f]Gisela[/name_f]
[name_f]Kadence[/name_f] [name_f]Greta[/name_f]
[name_f]Kadence[/name_f] [name_f]Hanna[/name_f]
[name_f]Kadence[/name_f] [name_f]Helene[/name_f]
[name_f]Kadence[/name_f] [name_f]Ilse[/name_f]
[name_f]Kadence[/name_f] [name_f]Ingrid[/name_f]
[name_f]Kadence[/name_f] [name_f]Irene[/name_f]
[name_f]Kadence[/name_f] [name_f]Jana[/name_f]
[name_f]Kadence[/name_f] [name_f]Julia[/name_f]
[name_f]Kadence[/name_f] [name_f]Johanna[/name_f]
[name_f]Kadence[/name_f] [name_f]Louisa[/name_f]
[name_f]Kadence[/name_f] [name_f]Margit[/name_f]
[name_f]Kadence[/name_f] [name_f]Nina[/name_f]
[name_f]Kadence[/name_f] [name_f]Pauline[/name_f]
[name_f]Kadence[/name_f] [name_f]Rosamunde[/name_f]
[name_f]Kadence[/name_f] [name_f]Sigrid[/name_f]
[name_f]Kadence[/name_f] [name_f]Saskia[/name_f]
[name_f]Kadence[/name_f] [name_f]Terese[/name_f]
[name_f]Kadence[/name_f] [name_f]Victoria[/name_f]
[name_f]Kadence[/name_f] [name_f]Lorelei[/name_f]
[name_f]Kadence[/name_f] [name_f]Ursula[/name_f]
[name_f]Kadence[/name_f] [name_f]Else[/name_f]
[name_f]Kadence[/name_f] [name_f]Ruth[/name_f]
[name_f]Kadence[/name_f] [name_f]Katharine[/name_f]
[name_f]Kadence[/name_f] [name_f]Katharina[/name_f]
[name_f]Kadence[/name_f] [name_f]Amalie[/name_f]
[name_f]Kadence[/name_f] [name_f]Amalia[/name_f]
[name_f]Kadence[/name_f] [name_f]Liesl[/name_f]
[name_f]Kadence[/name_f] [name_f]Emma[/name_f]
[name_f]Kadence[/name_f] [name_f]Annalise[/name_f]
[name_f]Kadence[/name_f] [name_f]Hana[/name_f]
[name_f]Kadence[/name_f] [name_f]Klara[/name_f]
[name_f]Kadence[/name_f] [name_f]Mathilde[/name_f]
[name_f]Kadence[/name_f] [name_f]Elisa[/name_f]
[name_f]Kadence[/name_f] [name_f]Frida[/name_f]
[name_f]Kadence[/name_f] [name_f]Amelia[/name_f]
[name_f]Kadence[/name_f] [name_u]Aubrey[/name_u]
[name_f]Kadence[/name_f] [name_f]Johanna[/name_f]
[name_f]Kadence[/name_f] [name_f]Ottilie[/name_f]
[name_f]Kadence[/name_f] [name_f]Wilhelmina[/name_f]
[name_f]Kadence[/name_f] [name_f]Klarissa[/name_f]
[name_f]Kadence[/name_f] [name_f]Frederica[/name_f]
[name_f]Kadence[/name_f] [name_f]Carolina[/name_f]
[name_f]Kadence[/name_f] Annalena
[name_f]Kadence[/name_f] [name_f]Annelie[/name_f]
[name_f]Kadence[/name_f] [name_f]Bianka[/name_f]
[name_f]Kadence[/name_f] [name_f]Lieselotte[/name_f]
[name_f]Kadence[/name_f] [name_f]Mathilda[/name_f]
[name_f]Kadence[/name_f] [name_f]Sara[/name_f] (SAR-uh, not sair-uh)
[name_f]Kadence[/name_f] [name_f]Eleonora[/name_f]
There are a lot of good [name_m]German[/name_m] name ideas but many of them seem quite old-fashioned to 20something Germans, so in the following link you can find the top 500 [name_m]German[/name_m] baby names for each gender:
Maybe you find something you like there =)