My great-grandfather, Moshe Kneler left Russia and went to Buenos Aires. According to my grandmother, Moshe came in 1904 with his wife Sheba to Buenos Aires where they had two children, Solomon & Sara. Solomon is my paternal grandfather. My parents left Argentina about 30 years ago and came to the US where now my family lives in California. Do you know the name of your grandftaher's father? My grandmother will try to see if she can track his name and see if they match. Let me know what other information you have and we'll see if we can piece this together. Where do you live now?