How did Residente and Visitante, members of the hip-hop group Calle 13, get their stage names?

Residente and Visitante adopted their stage names from a system used in the gated community in Trujillo Alto, Puerto Rico, where they grew up.

René Pérez Joglar (Residente) lived inside the community. When he returned home, he would tell the security guard he was a "residente" (resident).

His stepbrother Eduardo Cabra (Visitante) lived elsewhere. When he came to visit René, he had to register at the gate as a "visitante" (visitor).

https://en.wikipedia.org/wiki/Calle_13_(band)#2004-2005:_early_years