I don't want this to veer too far off-topic but was she the sister of Hans Viktor von Salviati? He is sometimes listed as 'Graf' and was one of the plotters (perhaps along with Louis Ferdinand?) in the failed attempt to assassinate Hitler. He was later executed for his role. I don't know if a) they were related b) he was actually a 'Graf' since sometimes it's listed and sometimes not and c) whether it was hereditary and, if Dorothea was related, their father was a Graf or if the title was bestowed on him individually.