The only information I have on the name Ganea at the moment is that my grandfather Vasile Mauch's sister Elisabeth Mauch married a man named Mr Cavadia, and they had two daughters, Else and Mimi. Else married a Mr Ganea and they had three sons. I do not know the husband or the son's names, but do have a photo of them.
Elisabeth Mauch was born around 1905, so I guess that Else and her husband Mr Ganea would have been born approximately 1920/30's, so your grandmother Ganea you are referring to could possibly be his mother, aunt or grandmother depending on her age. How old was she when she went to the States in 1912?
Do you know what area your grandmother was born or living in and what other family names from Romania are you are looking for ? By the way, I have tried to email you privately but your address didn't work.