My name is Dmitry Gringauz. We immigrated from Minsk in 1980. My grandfather, Lipa, used to tell me a story about one of his brothers who immigrated to US in 1920 or so, right after the Russian Revolution.
The Ellis Island passenger record for Jacob Gryngauz produced the closest match, based on the last name, date of entry and age.
I'd be interested to find out if Jacob Greenhouse mentioned here left any notes or records about his family that was left back in the Soviet Union.
Thank you in advance,