Something is up in the Florence restaurant world (although I am not sure exactly what and don't want to speculate until I know more). The former Trattoria Garga has been renamed "Trattoria Gargani" (see the photo below, you can tell the the marble is newer on the part that says "Gargani") while the Garga name is now being used on the newer restaurant on Via San Zanobi called "La Cucina del Garga" (sorry no photo and I have not eaten there yet).
I think there is a family story here - I will post more when I find out!