Set, Satan, and Shaitan are the same. "Satan" is a Hebrew word for the pagan Egyptian Set. Satan, Shaitan, Set or Seth ("Set-hn" as spoken in the ancient Hebrew) is a pagan entity, the "adversary" of Judaic theology. (A "pagan" is anyone not Judaic, Christian or Muslim.)
The Egyptian priest Manetho associated the Jews with the Hyksos and Moses with the Egyptian priest Osarsiph. It was at this time that the belief the Jews worshipped an ass – an animal holy to the Egyptian god Set was established. Both the Jews and the pagan Egyptians used the labels (i.e., Satan, Set, Seth, or "Set-hn" as spoken in the ancient Hebrew) to defame each other. How fitting that amidst this epic struggle and bloody conflict, the entity known as Satan was born into the World. Such conflict continued through the Maccabean period (with Antiochus Epiphanes), and continues into modern times on several fronts.
There is a recurring theme that alludes to the hostility between the pagan Egyptians and the Judaic. Often it is claimed by the Neo-Pagans that Satan is only found in Christianity. How can this be if Satan is undeniably a Hebrew word adapted from the name of the pagan Egyptian god Set? The Jewish synod of rabbinical authority will deny that Satan even exists. How do they reconcile that with the fact that it is a Hebrew word?
Food for thought...
From Thomas Hobbes' Leviathan:
Part III. Of a Christian Commonwealth. Chap. xxxviii. Of Eternal Life, Hell, Salvation, and Redemption.[12] And first, for the tormentors, we have their nature and properties exactly and properly delivered by the names of the Enemy (or Satan), the Accuser (or Diabolus), the Destroyer (or Abaddon). Which significant names (Satan, Devil, Abaddon) set not forth to us any individual person, as proper names do, but only an office or quality, and are therefore appellatives, which ought not to have been left untranslated (as they are in the Latin and modern Bibles), because thereby they seem to be the proper names of demons, and men are the more easily seduced to believe the doctrine of devils, which at that time was the religion of the Gentiles, and contrary to that of Moses, and of Christ.
[13] And because by the Enemy, the Accuser, and Destroyer, is meant the enemy of them that shall be in the kingdom of God, therefore if the kingdom of God after the resurrection be upon the earth (as in the former Chapter I have shewn by Scripture it seems to be), the Enemy and his kingdom must be on earth also. For so also was it in the time before the Jews had deposed God. For God's kingdom was in Palestine, and the nations round about were the kingdoms of the Enemy; and consequently, by Satan is meant any earthly enemy of the Church.
Part IV. Of the Kingdom of Darkness. Chap. xlvii. Of the Benefit that proceedeth from such Darkness.
[21] For from the time that the Bishop of Rome had gotten to be acknowledged for bishop universal, by pretense of successsion to St. Peter, their whole hiearchy (or kingdom of darkness) may be compared to the kingdom of fairies (that is, to the old wives' fables in England, concerning ghosts and spirits and the feats they play in the night). And if a man consider the original of this great ecclesiastical dominion, he will easily percieve that the Papacy is no other than the ghost of the deceased Roman empire, sitting crowned upon the grave thereof. For so did the Papacy start up on a sudden out of the ruins of that heathen empire.
[23] The fairies, in what nation soever they converse, have but one universal king, which some poets of ours call King Oberon; but the Scripture calls Beelzebub, prince of demons. The ecclesiastics likewise, in whose dominions soever they be found, acknowledge but one universal king, the Pope.