There is an idea among some of the prophecy researchers or preachers, to sort of blur the lines between the gods of the ancient world. Nimrod is Osiris, Baal, Tammus, Apollo, and a lot of other deities that the different peoples in the ancient world worshipped, according to these preachers.
To me, that sort of thinking doesn't add up with what we know about the heavenlies, the power of the air, and how the rebel angelic world is constructed, and divided. There wasn't one sole god in ancient times with several names. There were 72 regional, national angelic rulers, in the skies (and still are, but probably not the same ones), who had been given authority by God, over these nations, because of their choise to not follow the highest God of heaven. 1
So when these peoples worshipped and named their gods, they became known as Marduk, Baal, Tammuz, Apollo, Zeus, and so on. It may seem convenient to combine all of them, or mostly all of them, into one, to get certain prophecy interpretations to add up, and cause expectations of coming events that demands some particular deity, or rebel angel, from the past, to show up again. But by doing that, as I said, one will deny the reality of the divine council 2, and of its authority over the nations, and all clarity that brings to the understanding of the Bible and the history of the ancient world.
Nimrod is not identical with the gods of the ancients. He was a man, a human, according to the Bible. On the other hand, Osiris, in Egypt, may well have been an angel, and one of the postflood descended angels, who, when they came down, took the thrones of those nations they previously had been heavenly watchers over. Others like them were Marduk in Babylon, Apollo and Zeus in Greece (I know Zeus was born on earth according to some tradition, but if its true, he still may have been born of two descended angelic parents), Baal in Canaan, etc. These all were ruling in the flesh, on earth, having a number of other, lower ranked, descended angels under them. Together these, in every nation, also produced nephilim sons, who became human-angel fathers to the kingly lines of those nations. This is why almost every people on earth has mythologies of being children, or half children, of gods from the sky. These are not fantasies, this is strong confirmation of the truth of the Bible, which tells us exactly of that reality, in the distant past.
Interior of the Roman Pantheon
Then, during the bronze ages, these cultures were destroyed, by the holy angels of God, causing wars and natural disasters to make an end of this "alien" influence on earth, and over humanity. Later on, when people told about these events, the longer the distance in time was, the more likely was it that some of the details, names, and conceptions, were confused, in those later days of idolatry. Names of deities may have been borrowed from people to people, giving an illusory cause for nowadays' researchers to make up ideas of multiple identifications.
But (again), this was not the case from the beginning. In Rome, when they had conquered a nation, they took their idol images, of that nation's particular god, and placed it in the roman Pantheon, the house of all gods. Those gods were not all one and the same. They were depictions or representations of the 72 3 world rulers, who originally created all those religions and cults.
Hittite storm god
An example of this confusion, is the name Adad, or Hadad. This god, the stormgod, was worshipped in many ancient nations. That doesn't mean it was the same deity/angel. There were "stormgods" over every nation, every nation had its set of heavenly rulers, one of them the leader and the others the lower rank rulers and messengers. Often they were given the same name in different nations, because the names were more job descriptions from the beginning, than "names". Baal, for example, means Lord. So in every nation, this description was used, not only of the leader angel, but could also be used of the ones under him. People who had the same root language of course named their deities with identical or similar names. The hittites had their Adad, the Canaanites had their Hadad, the Assyrians had their Adad.
Not the same deities/angels, but different deities/angels, with the same job, and job description, thus.
1 Gen. 10:25, Gen. 11:8-9, Deut. 4:19, Deut. 32:8 lxx.
2 Also mentioned in Dan. 4:17.
3 Some say they were 70, but this is depending on how one counts. In the ugaritic parallel, there were 70 gods under their highest god El, making the gods in all 71, but obviously they did not count the god of Israel, which was Yahweh.