Tramontina is a brand originally from Brazil, more famous (in Brazil) for cutlery than cookware. Their products are good, specially the Brazilian made stuff.
Nowadays, most of their products are made in China so they are probably running production of their designs under different brands. Target sells their cast iron cookware under a house brand name too.
"Tell me what you eat, and I will tell you what you are" Anthelme Brillat-Savarin