Anything citrusy (Sp???) including, orange juice and lemonade, goes well with tequila, as well as clear sodas (sprite, 7up). Shit, a margarita is pretty much just lemonade with a touch of triple sec.
Anyway, this doesn't have a name but it works: take about equal parts of any clear soda and either OJ or lemonade (or both), then about 1/4 that amount of tequila (or less, it's to taste, not by measure), then add a touch of lemon or lime juice.