From Diablo Wiki
The Nephalem were the first humans upon Sanctuary, created as a result of the union between Angels and Demons. The creation process is unknown, although it is for certain completely unlike human procreation.
Such a Celestial union granted the Nephalem great power. So great was their potential that the demon Lilith attempted to use their power to build an army. Inarius put an end to her malicious designs and used the Worldstone to diminish the power of the Nephalem. Such is the curse upon the Nephalem that each successive generation also loses power. In fact, only the first generation have kept their full potential.
The lives of very few individual Nephalem have been recounted throughout the history of Sanctuary, and it is only those few who are now known by name.
Ancients as Nephalem
The "Ancient Ones", or the Ancients, have been associated with the "spirits of the nephalem." Whether they really are spirits of the Nephalem, or perhaps these are Nephalem descendants (and they are spirits of them) is unknown. The powers of Madawc seem to indicate he has some sort of Nephalem connection.
Nephalem in Diablo III
The Nephalem comes from the biblical mythology of the Nephilim.
|Characters & NPCs Import. Chars Rumoured Diablo 3 NPCs Diablo 2 NPCs Diablo 1 NPCs Minor A-K Minor L-Z Fanmade|
|Diablo III's Possible NPCs|
|NPCs of Diablo II||
Achilios - Adria - Akara - Albord - Aldric Jitan - Alkor - Anya - Arkaine - Asheara - Assur - Atma - Augustus Malevolyn - Baerna - Banagar - Benjin - Brek - Buyard Cholik - Camylle - Celestia - Cornelius - Darrick Lang - Diomedes - Drognan - Edgewulf - Elora - Elzix - Emilye - Fara - Farnham - Fautzin - Galeona - Garda - Gheed - Gillian - Gorst - Greiz - Griswold - Guthwulf - Hagan - Halbu - Hanos Jeronnan - Hargo - Hays - Hratli - Hrothwulf - Humbart Wessel - Hunfrith - Hyram - Icharion - Jace - Jamella - Jerhyn - Jodas - Juris Khan - Justinian IV - Kabraxis - Kara Nightshadow - Karybdus - Kashya - Kentril Dumon - Kethryes - Korlic - Kreghn - Ku Y'leh
Lam Esen - Larzuk - Linarian - Lysander - Malah - Mat Hu-Ring - Meshif - Mirakodus - Mordecai - Natalya - Nefriti - Nellia - Nihlathak - Nor Tiraj - Norrec Vizharan - Ogden - Ord Rekar - Orlif - Ormus - Oskal - Palashia - Pepin - Qarak - Qual-Kehk - Riordan Nesardo - Sadun Tryst - Salene Nesardo - Sardak - Sarnakyle - Septumos - Simon - Talic - Taramis Volken - Tilgar - Tobio - Toko - Tylwulf - Vischar Orous - Warriv - Wirt - Wulfgar - Xazax - Zagraal - Zayl - Zorea