Seems like every body has as story about why and when the Margarita came to fruition. They go back as far as 1934 before most of us were even a notion in the shade of the Sonoran desert. (I have no doubt that more stories are being concocted daily. Shaken, not stirred.)
Here’s a few that I grabbed from Wikipedia. Most of the stories center around a bartender, a starlet and the need to woo:
Thankfully, there’s a simpler and more probably more viable explanation. According to David Wondrich, in his book “Imbibe”, it’s probably just a figurative and literal spanish translation of “Daisy”. “The Daisy” was a popular sweet ‘n sour cocktail in the US during the roaring 20’s. When Prohibition hit the Yanks took their cravings south of the border and ordered up Daisies down that-a-way. With no whisky, rum or brandy on the shelf the bartenders substituted Tequila – what else?
And you know what? It tasted pretty great. “Margarita” being the literal spanish translation of “Daisy” stuck. Call it a pre NAFTA success story.