San Gennaro usually refers to St Januarius, bishop of Naples.
San Gennaro may also refer to:
Festival, Fair, or Feast of San Gennaro: September 19 San Gennaro, a grape Cathedral of San Gennaro in Naples San Gennaro extra Moenia ("San Gennaro-beyond-the-Walls"), a church in Naples Royal Chapel of the Treasure of San Gennaro in Naples Museum of the Treasure of San Gennaro in Naples San Gennaro al Vomero, a church in Naples San Gennaro all’Olmo, a former church in Naples Catacombs of San Gennaro in Naples Abbey of San Gennaro: Abbey of San Gennaro in Cervinara (est. c. 1100), now dedicated to Our Lady of Sorrows in Capolona (est. 972) San Gennaro dei Poveri ("San Gennaro of the Poor"), a hospital in Naples Porta San Gennaro ("San Gennaro Gate") in Naples San Gennaro Vesuviano, a village near Naples Order of San Gennaro, a knightly order headed by the titular King of Naples, a member of the Spanish royal family Spanish ship San Gennaro (1765), a Spanish 86-gun ship of the line ceded to France, where it served as the Tourville
See also Januarius, the latinate form of the name January, the anglicized form of the name Gennaro, the italicized form of the name Treasure of San Gennaro, an Italian comedy San Gennaro's Blood (San Gennaro Vére), a novel set in Naples
"gennaro" also refers to the month January in italian