An erotic actor or erotic actress or a porn star is somebody who appears in pornographic movies. Many actors/actresses may appear nude in films (usually rather briefly) or on stage but even if they depict sexual behavior they are not considered erotic actors. Most erotic actors use stage names.
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Eric the Red, (c.950-1003), explored and colonized Greenland
Leif Ericsson, (born 970), attempted to colonize Vinland
George Everest, ...