Thermocouple.
Yes, although thermocouples are usually made of metal (e.g. iron - constantan) while Peltier effect devices are made of semiconductors (bismuth telluride relatives). I know you can make a thermopile, many thermocouples in series, but I think the charge carriers in metals are always electrons. In semiconductors, they can be plus and minus, so you can add outright the two effects in a pile, while in a metal you have to subtract, the metal with lesser effect reducing, but not completely canceling, the output from the other metal.