Hi, I just want to inform that if "voivod" is the right spelling of the name, then it's definetely a Romanian name. The problems is that this name is common in Romania, so there are a lot of this name there. I never heard of the name "Voivoda", like you said, but usually you can see "Voievod" pretty often, too. I also want to tell that "voievod" can be a common noun in Romanian language, and it means "prince" or some kind of king, word used a long time for someone who leads a group of people. You can find this word a lot in Romanian history.