I looked at the ships records and there was a Giovanni that traveled with my Grandfather Tommaso Mazzella. Arriving in NYC April 9th 1909 via Napoli...and another Giovanni Mazzella(age 19) traveling with my grandfathers brother, Joe Guiseppe Mazzella (age 19)may 17, 1910...through La Havre France. Could be your grandfather....many times they traveled back and forth to visit, get other family members...what is interesting about Giovanni is there is a D next to his name...not an s for single or m for married....They could be cousinf because I did hear that my Grandfather traveled with a cousin...