After doing lots of research for a family research project, I have found lots of useful info! It turns out that the spelling of my last name was originally Galluccio on my great-grandfather Rosario Galluccio's passport in 1911. He immigrated to Ellis Island in search for work at the United States Cement Plant in Ilasco, MO. (A small immigrant town south of Mark Twain's -and my-hometown of Hannibal, MO) After arriving in the U.S. he worked for several years in order for his wife Maria to be able to come join him in America. Keep in mind that Ilaso is located right on the Mississippi River which is a long way from NYC. It turns out that because of WWI, my great-grandparents reunion was delayed ten long years! Finally in 1921 she immigrated to the U.S. through Boston and they were together again and started a family right away. The spelling of the name was changed when my grandfather and his siblings went to school. Their teachers believed that Galluzzio was an easier spelling, and so changed it to that. Since neither of my great-grandparents could read or write, they had little say in this. I know that this may not be helpful to you in your research,
but I found it very interesting and motivating.