I thought this was interesting. From wikipedia:
~~~~~While much speculation surrounds the meaning behind the name Etsy, one story is Etsy got its name because Robert Kalin "wanted a nonsense word because I wanted to build the brand from scratch. I was watching Fellini's 8 ½ and writing down what I was hearing. In Italian, you say 'etsi' a lot. It means 'oh, yes.' And in Latin, it means 'and if.'" ~~~~~
