I was about to comment this so instead I'll comment that Aldi (Trader Joes) and Lidl also arose out of a familial dispute over whether or not to sell alcohol.
Don’t forget the Russian and Turkish Baths in the east village (NYC) - my favorite instance of a familial dispute resulting in a business splitting. Now it is two businesses occupying the same physical location, but different temporal locations: when you get a pass it’s only valid for certain days of the week depending on which brother’s business you purchased it for.
