I found this on thinkbabynames.com : "The girl's name Idania \i-da-nia\ is a variant of Ida (Old German, Greek), and the meaning of Idania is "hardworking". [...] Idania is a very rare female first name and a very rare surname (source: 1990 U.S. Census)."
I found that the name is of slavic origins on several other pages, though. The name reminds me of Idony (English) or Iduna (German). I hope this helps you ;)
This message was edited by the author on April 18, 2009 at 6:08 AM