Sorry, but...
in reply to a message by mornglory42
...this is very unlikely to be correct. The Adena Indians were a prehistoric group, one of the "mound-building" cultures. "Adena" is a name given to them by historians and archeologists; the name was not applied to that culture before 1901, and it comes from the name of an estate called Adena where some of the first excavations of the mounds were done.
http://www.ohiohistorycentral.org/entry.php?rec=2220
There might be a very few girls in Ohio whose parents were inspired to name them Dena from knowledge of this culture, but it wouldn't be the derivation for the huge majority of girls with this name.
Dawanna is most likely a feminine form of DeJuan, which is itself a modern creation adding the prefix De- to Juan.
http://www.ohiohistorycentral.org/entry.php?rec=2220
There might be a very few girls in Ohio whose parents were inspired to name them Dena from knowledge of this culture, but it wouldn't be the derivation for the huge majority of girls with this name.
Dawanna is most likely a feminine form of DeJuan, which is itself a modern creation adding the prefix De- to Juan.