Being a second-generation Italian-American, I wasn't affected by the Italian naming conventions. I once asked my mother why we never spoke Italian and she answered, "When we got married, I wanted an 'All-American" household, so we only spoke English around you kids." I'm certain one reason for this was to lessen the impact of racial bias against her kids at the time.
This might also be the reason why I was named "Jerry"--as my mother told me, "I thought of 'Jerry' after watching a Jerry Lewis movie while I was expecting you. It sounded very American." While my birth certificate says "Jerry", I had no idea my legal name was "Jerry" until at age 13, I got a copy of my birth certificate to get my working papers. "Jerry"? Well, that was a lot better than "Gerald", my baptism name, which I could barely pronounce properly when I was little. Even so, everyone in my family knew me as "Gerald" until I ordered them to stop calling me that. Still today, many won't call me "Jerry". (To add to my confusion, Saint Gerald was French!).
Being the second born son, I should have been named after my mother's father, Salvatore Vetri. That would have been nice, since my Dad's lifelong nickname was Sal, even though he was born Saverio. Since I was born 11 years after Salvatore's passing, perhaps my mother felt less obliged to name me after him.
My sisters and brother who came before me met the same fate with their names. The oldest of us--the twin sisters--Barbara and Joan should have been named Caterina and Mariantonia, Caterina being my paternal grandmother's name, and my maternal grandmother being Caterina. (Barbara was the oldest by three days... YES, they were born three days apart, but that's another story.) Kenneth, my older brother, should have been named Sergio, after my paternal grandfather. My sister Joyce should have been named after one of my aunts, perhaps Antonia or Rosa. Although I know that Barbara, Joan, Kenneth and Joyce are my siblings, I have no idea who they were named after since those names are unknown in our family tree. Only their middle, confirmation names reflect names of uncles or aunts.
Perhaps other movies my mother watched while she was pregnant for each of them influenced her... The twins? Barbara Hutton and Joan Crawford were famous during the 1940s when the Twins were born, Joyce Reynolds was a well-known, All-American looking actress when my sister Joyce was born. But Kenneth? There really were no famous actors or performers named Kenneth when my brother was born--and it's a very British name, at that. Mom probably just liked the sound of it.
As for me, I really think I would have preferred to be named Francesco, Giovanni, or even Anselmo after one of my my uncles. "Jerry" never really suited me.
And here's an interesting note about my father's name, Saverio... There is no Saverio in our family tree, and since my great-grandfather Anselmo was adopted, there was no maternal grandfather to name him after. It seems the name was given to my father (second son of Sergio) as a "votive name". Saverio means "second home" or "new home". My grandfather traveled to America 2 times before bringing over is wife and three children, 7 year-old Anselmo (named after my great-grandfather), 4 year-old Saverio and baby Antonia. Perhaps Saverio was born at the moment my grandfather decided to take the first steps on emigrating. Saverio. New Home. It suited Dad.
How to properly name an Italian child...
The basic convention goes like this:
Be aware that there are exceptions to this naming custom that preclude this assuming your ancestors adhered to these conventions. In the case of orphans, they would have no idea of parents' names. For someone estranges from his family, he might not want to use their names. It is also possible that the first born son might have died, so they might have also given the same name to a second born son who survived. Many children did not live to adulthood in the nineteenth century and earlier.
It is also very possible that your ancestors didn't keep to these conventions, for instance, many named their first sons after a hero. For example a hero in southern Italy (The Two Kingdoms of Sicily) in the early 1800s was Guglielmo Pepe, so an ancestor in this time period could be named after him.
A final example of exceptions to the naming custom can be seen in the nontraditional family of my great-great-grandparents, Pasquale and Rosa. They were great opera fans who named all of their children after characters from their favorite operas. Due to theses types of exceptions, you cannot use the Italian naming tradition to assume an ancestor's name.
When doing genealogical research another problem can arise when finding several people living in the same town at the same time, all with the same first and last name. Think about it a second. If someone named Giovanni had five sons, all of them could have named their first born sons Giovanni, resulting in confusion as to which one is your gr-gr-grandfather and which are merely distant uncles. The same would hold true when researching the maternal members... Nonna Rita might have several Ritas that were named after her. They might even have been born in the same year! Remember, families were often quite large, especially in the rural, agricultural south.
This shows that although it seems naming conventions might help you discover your ancestors, they might also confuse the issue. When in doubt, it might be a good idea to hire a genealogical research professional to make sure you find the right people in your family tree.
For help in researching your ancestors, the Facebook group
Italian Genealogy is highly recommended by GVI. There are several professional researchers who are members who freely offer their advice and who can be hired to help find your ancestors.