In Italy, the name is Gennaro (January), and may have been anglicized to Generio listed in Salvatore Granucci's obituary.

California Death Index lists Genaro (without 2 N's) with birth/death dates. I'll use them as they appear accurate.

New Yorkl Passenger lists 1820-1957: Gennaro Granucci
Arrival date 9 May 1893 NY, NY
Birtth about 1859 in Cerasoma, Italy
Age 34
Departed from Genoa, Italy
Ship Kaiser Wilhelm II

1905 US City Directory
Residence Santa Rosa, CA
Under Duncan's Mills is listed Gennaro Granucci, Teamster

1930 Fed. Census lists:
Gemsaro (sic) Granucci
Corrected in database to Gennaro
Male born about 1860 in Italy
Home in 1930: Healdsburg, Sonoma, CA
Married to Antonietta Granucci
Immigrated 1890
Household members listed:
Gemsaro (sic) Granucci (Italy) (70 about 1860), Antonietta Granucci (Italy) (50 about 1880), Frank Granucci California (28 about 1902), Margaret Granucci California (25 About 1905), Angelina Granucci California (19 About 1911)

Genaro Granucci, "California, Death Index, 1940-1997"
Name: Genaro Granucci
Event Type: Death
Event Date: 27 Feb 1949
Event Place: Sonoma, California, United States
Birth Date: 22 Jan 1860
Birthplace: Other Country
Gender: Male
Father's Name: Granucci
Mother's Name: blank