The Irish-Italian connection/tradition originates with the two cultures merging in New Orleans after WWII.
In terms of numbers and influence, the Irish were first in New Orleans. O’Reilly is an outlier on this; the Irish influence begins in the 1820s. That first wave of Irish immigrants provided the manpower to build the New Basin Canal.
Crescent City Living’s video on the Irish Channel, produced by Crista Rock, with commentary from NOLA History Guy.
These are articles about the Irish I’ve written over the years. This podcast doesn’t go into a ton of detail, since its focus is how all these folks ended up in the same parade. 🙂 Don’t let that deter you from looking further into the Irish. Their story is an important part of the bigger story of New Orleans.
In many ways, the Italians get more exposure in the touristy writing than the Irish. That’s mainly because the Italians all but took over the French Quarter. This was in the 1880s and 1890s. The Italians left a lasting mark on the French Quarter. It’s the one neighborhood just about every visitor sees. Naturally, this is going to leave an impression. The Italian groceries, St. Mary’s Italian church (next to the convent), so many other Italian-owned businesses. Even the building the Louisiana State Museum currently uses as a warehouse for their massive collection was at one time a pasta factory!
Anyway, I wasn’t kidding about going to the Beauregard-Keyes House, either. The mafia connection is fascinating!
It’s not all about the Quarter, though, for the Italians.
So, the Italians migrated from the Downtown side of Canal Street. They went to Gentilly, Metairie, and St. Bernard Parish. The folks who went out to Metairie teamed up with the Irish for the big parade.