I believe that Adam and Eve were the first humans created by Jehovah but that does not mean there were not other creations or beings.
Ancient Sumerian text and even the Bible itself tells us that there were other beings living on earth at the start.
Genesis 6 1–4 is a good place to start.
1 When human beings began to increase in number on the earth and daughters were born to them,
2 the sons of God saw that the daughters of humans were beautiful, and they married any of them they chose.
3 Then the LORD said, “My Spirit will not contend with humans forever, for they are mortal[b]; their days will be a hundred and twenty years.”
4 The Nephilim were on the earth in those days—and also afterward—when the sons of God went to the daughters of humans and had children by them. They were the heroes of old, men of renown
Who were the Nephilim? The nephilim are the fallen angels who were cast out were refe who are referenced elsewhere in the bible
Numbers 13:32–33, where the Hebrew spies report that they have seen fearsome giants in Canaan
32. And they spread among the Israelites a bad report about the land they had explored. They said, “The land we explored devours those living in it. All the people we saw there are of great size.
33. We saw the Nephilim there (the descendants of Anak come from the Nephilim). We seemed like grasshoppers in our own eyes, and we looked the same to them.”
There are effectively two views[16] regarding the identity of the Nephilim, which follow on from alternative views about the identity of the sons of God:
Offspring of Seth — The Qumran (Dead sea) scroll fragment 4Q417 (4QInstruction) contains the earliest known reference to the phrase “children of Seth”, stating that God has condemned them for their rebellion. (Nonetheless, a few commentators dispute the interpretation of this reference.)[citation needed] Other early references to the offspring of Seth rebelling from God and mingling with the daughters of Cain, are found in rabbi Shimon bar Yochai, Augustine of Hippo, Julius Africanus, and the Letters attributed to St. Clement. It is also the view expressed in the modern canonical Amharic Ethiopian Orthodox Bible.
Offspring of angels — A number of early sources refer to the “sons of heaven” as “Angels”. The earliest such references[17] seem to be in the Dead Sea scrolls, the Greek, and Aramaic Enochic literature, and in certain Ge’ez manuscripts of 1 Enoch (mss A-Q) and Jubilees[18] used by western scholars in modern editions of the Old Testament Pseudepigrapha[19]. However, “Angels” in this context has sometimes been considered to be a sarcastic epithet for the offspring of Seth who rebelled (see above). The earliest statement in a secondary commentary explicitly interpreting this to mean that angelic beings mated with humans, can be traced to the rabbinical Targum Pseudo-Jonathan, and it has since become especially commonplace in modern-day Christian commentaries.
Others do not take either view, and believe that they are not historical figures but are ancient imagery with questionable meaning.[20]
The fallen angels interpretation
The New American Bible commentary draws a parallel to the Epistle of Jude and the statements set forth in Genesis, suggesting that the Epistle refers implicitly to the paternity of Nephilim as heavenly beings who came to earth and had sexual intercourse with women.[21] The footnotes of the Jerusalem Bible suggest that the Biblical author intended the Nephilim to be an “anecdote of a superhuman race”.[22] Genesis 6:4 implies that the Nephilim have inhabited the earth in at least two different time periods—in antediluvian times “and afterward.” If the Nephilim were supernatural beings themselves, or at least the progeny of supernatural beings, it is possible that the “giants of Canaan” in Book of Numbers 13:33 were the direct descendants of the antediluvian Nephilim, or were fathered by the same supernatural parents.