Family Dollar was started in Charlotte NC in 1959, and Dollar Tree was started in Norfolk, VA in 1953. Neither chain is a franchise, and both are publicly owned by their shareholders ....., DLTR-nasdaq, and FDO-ny stock xchange.
www.dollartree.com is a dollar store where everything costs one dollar.
www.familydollar.com is a store where most items cost less than five dollars. It's a store where your dollar is worth more, or something like that.