Yes, it is a sort of "nations where germanic languages are dominant". However, at some point you have to say it's good enough; For example, this is where german is spoken in europe:https://upload.wikimedia.org/wikipedia/commons/0/03/Legal_statuses_of_German_in_Europe.svg
^^Making a map of that would just be crazy...
Try to use german names instead of mixing them up.
I'll change the ones you mentioned, but if you have any more suggestions I'd love to hear them; It would really suck to go research every single name individually if I just have someone who speaks german who's willing to help me out :)
Edited 5/9/2016 13:55:02