Porfiri (see Porfirio
and Zosim (see Zosimos
) are Russian personal names.
Grigorievich is a patronym: son of Gregory
Zosimov is a family name derived from the personal name Zosim.
Luzhin is a family name derived probably from a place name. It might be translated as Grassman, approximately.
Svidrigaylov is also a family name probably derived from a place name. One might think that there was a town named Svidrigaylovo but I do not think somebody can imagine where that town might be located.