There you see what happens with your suggestions... 2 years old thread and do we have a female German voice? Of course not. :6
Re "Vicki" - may I remind you that Queen Victoria's mother tongue was indeed German?
Anyway - there aren't many names that are noticeably "German" and don't sound incredibly old-fashioned. Most of the names that are currently modern are either biblical (Anna, Marie etc) or of Latin or Greek origin (Victoria, Sophia), or re-borrowed from French or English after such a long loan period that it's not perceived as German anymore (Amelie, Luisa).
But what does it matter, there won't be a female Sprachassistent anyway. :6