You have so many awesome names on your list!
I think my two favorites from your girls names are Nadia and Miranda. My favorites from your boys list are Felix, Matias, and Mateo.
Girl - Juliet or Lucia
Boy - Mattias
I like Lucia and Juliet.
The boy names are nms, but I would probably choose Felix.
Girl - Miranda, this was our girl name
Boy - Xavier, love it! But my DH wasn't a fan.