Godalyn. Because Gosalyn is God:)

--Lucifer-- Isaiah 14

In Isaiah 14, "morning star" is used to mock the fallen King of Babylon. The morning star(ie Venus) was used because it shone bright before quickly fading at dawn. The term was used in a poetic, and possibly ironic way. Babylon is often used as a symbol of pride(tower of Babel) or an oppressive regime(such as Rome, due to the Jewish history with the Babylonian Empire) or opposition to God (such as in the Book of Revelations).

Helel ben-Shahar was the hebrew term used. It translates to "shining one, son of the morning," which refers to the morning star, the brightest "star" in the sky(ie Venus). Helel means "shining one, light-bearer."

The Latin Vulgate translated the word as lucifer, which is derived from lux(light) and ferre(to bring), meaning light-bringer. Lucifer was the Latin name for Venus, because Venus signaled the coming of dawn.

The Greek Septuagint translates it to Heosphoros(bringer of dawn), which also referred to Venus as the morning star.

Some English translations took the Latin word lucifer and used it as a name. Other translations stayed away from "lucifer" and use some variation of "morning star" or "day star" or "son of the morning star."

The verse was eventually correlated with Satan's fall from heaven, turning lucifer into the name Lucifer and regarding it as the original name of the devil before his fall.

--Baal--

Baal is a semitic word meaning lord, master, or owner. Over time, it became a title to refer to deities in Canaanite and Phoenician pantheons, particularly fertility and storm deities. The deities could be traced back to Adad/Hadad in Mesopotamia. It can also be equated with Babylon's Bel, and Greece's Zeus. The title of Baal was compounded with a second word to indicate an attribute, place or manner of worship, or something the place possesses. Baal-zebub was the god of the city of Ekron. Baal-peor in Moab, Baal-berith in Shechem, etc. I'm not actually sure if they're all names for the same god, or if they evolved to become considered different gods.

Baal-zebub(aka Beelzebub) of Ekron. Lord of the Flies. God of healing and oracles.

Baal-peor of Moab/Midian. Lord of the Opening(referring to the cleft of Mount Peor). God of fertility and licentiousness. Baalpeor eventually evolved into Belphegor.

Baal-berith of Shechem/Nablus. Lord of the Covenant. The Israelites abandoned Yahweh and began to worship the local Canaanite god. Rabbinic traditions sometimes equate Baal-berith with Beelzebub. In later demonology, Baal-berith was reclassified as a demon named Berith that oversaw pacts with mortals.

In the Old Testament/Hebrew Bible, Baal is used to refer to any gods that were not the Isrealite god, Yahweh. By the time of the New Testament, Baal became primarily associated with Beelzebub and equated with the devil. Later demonology reclassified Beelzebub as a demon.

--Satan--

Satan (Hebrew for adversary, opponent, accuser)is derived from the Hebrew term ha-satan, meaning "the aversary" or "the accuser" and was a title rather than a name. "Ha" means "the." Ha-satan, as opposed to plain satan, referred to a supernatural being(typically as part of a divine or heavenly council) that functioned as spiritual opposition or prosecution. "Satan" wasn't used as a name for the personification of evil(ie the devil) until around the New Testament.

--Abaddon-- Mentioned in Revelations

Abaddon(Hebrew): The word means destruction, doom, or ruin. In the Old Testament/Hebrew Bible, Abaddon is a poetic term to describe the most hopeless and miserable state of the afterlife as a place of destruction. It's synonymous with "the grave," and refers to the underworld/hell.

It's used in Revelations to personify a demonic entity, described as the Angel of the Abyss/bottomless pit. The Greek equivalent, Apollyon, is a title meaning "The Destroyer." It's referring to the devil again.

--Legion-- New Testament Gospels

Legion is probably the most explicit example of a demon, rather than an alternate name for the devil or hell. But it's not actually a single demon.

In the Bible, a man was tormented and possessed by demons that made him very dangerous to both himself and others. When asked for its name, the demons replied collectively, "My name is Legion, for we are many." A legion was the largest unit of the Roman army, made up of 3,000 to 6,000 soldiers. Jesus cast the demons into a herd of pigs(this was a gentile/non-Jewish area), which immediately ran into a lake and drowned.

--Azazel-- Mentioned in Leviticus 16

A scapegoat ritual was/is performed on the Jewish holiday, Yom Kippur (Day of Atonement). Two goats would be selected. One was to be sacrificed as a sin offering for the Lord, and the other for Azazel and would be symbolically given the sins of the people and sent to a desolate place in the wilderness(interpreted as a rugged mountain). At some point, the tradition became to drive it off a cliff so it couldn't return. The point was to send the sins back to the spirit of desolation/demon of the desert they came from.

The term Azazel is often regarded as a compound of "az" meaning strong or rough, and "el" meaning mighty, and ultimately referring to a strong mountain.

Another supposed compound comes from "ez" or "az" meaning goat, and "azal" meaning to go away(ie escape). Forming the term scapegoat.

Another interpretation connects it with the fallen angels "Uza" and "Azael." So the sacrifice of the goat was meant to atone [the people?] for the sins of those angels.

In the Apocryphal Book of Enoch, Azazel is a fallen angel who taught mankind the art of warfare, deception, witchcraft, and brought sin. He was the rebellious leader of the Nephilim before the great flood, and was chained to a mountain to await the Day of Judgment when he will be cast into the fire. Which sounds like another iteration of the devil to me.

--Asmodeus-- Not biblical, but bible-adjacent

Asmodeus is apocryphal, from the deuterocanonical Book of Tobit. In the story, a virgin named Sarah was married, but Asmodeus killed the husband before the consummation of the marriage. And this happened seven times, until Tobias(the eighth husband) and the angel Raphael overcome him with smoke from a fish heart and liver. Asmodeus was presumably driven by jealousy and lust. Or God allowed the husbands to be killed because they had impure intent.

He also appears a few times in the Talmud(Rabbinical text considered secondary to the Hebrew Bible/Tanakh). Asmodeus turns his desires to Bathsheba and later Solomon's wives. He replaces King Solomon for some time, before Solomon returns and Asmodeus flees.

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