JSFiddle - React, Tailwind, and code Playground

JavaScript

var names = ["Total All Banks","Total All Banks","Total Domestic Banks","Total Domestic Banks","B2B Bank","B2B Bank","Bank of Montreal","Bank of Montreal","The Bank of Nova Scotia","The Bank of Nova Scotia"];
var uniqueNames = [];
$.each(names, function(i, el){
    if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el);
});
console.log(uniqueNames);