Hi - we are most likely related!
My great-grandfather was Pasqualino Sei (b. 1877) of Lammari, Italy, which is about 5 km from Cappanori outside of Lucca. It isn't clear when he immigrated to the USA, the earliest ship records I can find in 1930 show that he had already been to the US at least once before.
He was married first to Emma Matteucci, who passed away in childbirth, and then to Argentina Nieri, with whom he had more children, including my very adored grandfather, Frank Joseph Sei (1919-1990). Emma and Argentina were both from near Lucca as well, and between them there were seven Sei children.
They lived in Albuquerque, NM (which is where I was born and grew up), and Pasqualino owned a large saloon downtown called P. Sei & Co. with another Italian immigrant. (My grandfather later owned a big business in packaged liquors there.)
The only other biographical details that I know on Pasqualino are that his American nickname was Pete, and his sister Germana Sei Gasperini lived in Albuquerque as well. I'm sure there were other siblings though.
I would love to know more about the Sei family, as I was too young to ask these questions before my grandfather passed away in 1990. The dairy farm is interesting because my grandfather was knowledgable about a lot of things that I took for granted as a kid, like mushroom hunting, drying and storing herbs for cooking, making sausage, Tuscan wines, etc.
Coincidentally, I've been living in Chicago for over 15 years now.