The noun Bēthleem (Bethlehem) & its variant in the Bible

(Translation from NRSV for the New Testament and Brenton for the Septuagint with a few modifications for a more litteral meaning)

Matthew

2: 1In the time of King Herod, after Jesus was born in Bethlehem (Bēthleem) of Judea, wise men from the East came to Jerusalem,
2: 5They told him, "In Bethlehem (Bēthleem) of Judea; for so it has been written by the prophet:
2: 6'And you, Bethlehem (Bēthleem), in the land of Judah, are by no means least among the rulers of Judah; for from you shall come a ruler who is to shepherd my people Israel.'"
2: 8Then he sent them to Bethlehem (Bēthleem), saying, "Go and search diligently for the child; and when you have found him, bring me word so that I may also go and pay him homage."
2: 16When Herod saw that he had been tricked by the wise men, he was infuriated, and he sent and killed all the children in and around Bethlehem (Bēthleem) who were two years old or under, according to the time that he had learned from the wise men.

Luke

2: 4Joseph also went from the town of Nazareth in Galilee to Judea, to the city of David called Bethlehem (Bēthleem), because he was descended from the house and family of David.
2: 15When the angels had left them and gone into heaven, the shepherds said to one another, "Let us go now to Bethlehem (Bēthleem) and see this thing that has taken place, which the Lord has made known to us."

John

7: 42Has not the scripture said that the Messiah is descended from David and comes from Bethlehem (Bēthleem), the village where David lived?"

Genesis (LXX)

35: 19So Rachel died, and was buried in the way of the course of Ephratha, this is Bethlehem (Bēthleem).
48: 7And as for me, when I came out of Mesopotamia of Syria, Rachel, thy mother, died in the land of Chanaan, as I drew nigh to the horse-course of Chabratha of the land of Chanaan, so as to come to Ephratha; and I buried her in the road of the course; this is Bethlehem (Baithleem).

Joshuah (LXX)

15: 59aTheco, and Ephratha, this is Bethlehem (Baithleem), and Phagor, and Aetan, and Culon, and Tatam, and Thobes, and Carem, and Galem, and Thether, and Manocho: eleven cities, and their villages,

Judges (LXX)

17: 7And there was a young man in Bethlehem (Bēthleem) of the tribe of Juda, and he was a Levite, and he was sojourning there.
17: 8And the man departed from Bethlehem (Bēthleem) the city of Juda to sojourn in whatever place he might find; and he came as far as mount Ephraim, and to the house of Michaias to accomplish his journey.
19: 1And there was a Levite sojourning in the sides of mount Ephraim, and he took to himself a concubine from Bethlehem (Bēthleem) Juda.
19: 2And his concubine departed from him, and went away from him to the house of her father to Bethlehem (Bēthleem) Juda, and she was there four months.
19: 18And he said to him, We are passing by from Bethlehem (Bēthleem) Juda to the sides of mount Ephraim: I am from thence, and I went as far as Bethlehem (Bēthleem) Juda, and I am going home, and there is no man to take me into his house.
12: 10And Abaissan died, and was buried in Bethlehem (Bēthleem).
12: 8And after him Abaissan of Bethlehem (Baithleem) judged Israel.
17: 9And Michaias said to him, Whence comest thou? and he said to him, I am a Levite of Bethlehem (Bēthleem) Juda, and I go to sojourn in any place I may find.

1 Samuel (LXX: 1 Kings)

16: 1And the Lord said to Samuel, How long dost thou mourn for Saul, whereas I have rejected him from reigning over Israel? Fill thy horn with oil, and come, I will send thee to Jessae, to Bethlehem (Bēthleem); for I have seen among his sons a king for me.
16: 4And Samuel did all that the Lord told him; and he came to Bethlehem (Bēthleem): and the elders of the city were amazed at meeting him, and said, Dost thou come peaceably, thou Seer?
20: 6And if thy father do in anywise enquire for me, then shalt thou say, David earnestly asked leave of me to run to Bethlehem (Bēthleem) his city, for there is there a yearly sacrifice for all the family.
20: 28And Jonathan answered Saul, and said to him, David asked leave of me to go as far as Bethlehem (Bēthleem) his city;

2 Samuel (LXX: 2 Kings)

2: 32And they take up Asael, and bury him in the tomb of his father in Bethlehem (Baithleem). And Joab and the men with him went all the night, and the morning rose upon them in Chebron.
23: 14And David was then in the strong hold, and the garrison of the Philistines was then in Bethlehem (Baithleem).
23: 15And David longed, and said, Who will give me water to drink out of the well that is in Bethlehem (Baithleem) by the gate? now the band of the Philistines was then in Bethlehem (Baithleem).
23: 16And the three mighty men broke through the host of the Philistines, and drew water out of the well that was in Bethlehem (Baithleem) in the gate: and they took it, and brought it to David, and he would not drink it, but poured it out before the Lord.
23: 24Asael Joab's brother; he was among the thirty. Eleanan son of Dudi his uncle in Bethlehem (Baithleem).

1 Chronicles (LXX)

2: 51Salomon the father of Baetha, Lammon the father of Bethlehem (Baithleem), and Arim the father of Bethgedor.
2: 54The sons of Salomon; Bethlehem (Baithleem), the Netophathite, Ataroth of the house of Joab, and half of the family of Malathi, Esari.
4: 4And Phanuel the father of Gedor, and Jazer the father of Osan: these are the sons of Or, the first-born of Ephratha, the father of Bethlehem (Baithleem).
11: 16And David was then in the hold, and the garrison of the Philistines was then in Bethlehem (Baithleem).
11: 17And David longed, and said, Who will give me water to drink of the well of Bethlehem (Baithleem), that is in the gate?
11: 18And the three broke through the camp of the Philistines, and they drew water out of the well that was in Bethlehem (Baithleem), which was in the gate, and they took it, and came to David: but David would not drink it, and poured it out to the Lord, and said,
11: 26And the mighty men of the forces were, Asael the brother of Joab, Eleanan the son of Dodoe of Bethlehem (Baithleem),

2 Chronicles (LXX)

11: 6And he built Bethlehem (Baithleem), and Aetan and Thecoe,

Jeremiah (LXX)

41 (48): 17and they departed, and dwelt in Gaberoch-amaa, that is by Bethlehem (Bēthleem), to go into Egypt, for fear of the Chaldeans:

Micah (LXX)

5: 1And thou, Bethlehem (Bēthleem), house of Ephratha, art few in number to be reckoned among the thousands of Juda; yet out of thee shall one come forth to me, to be a ruler of Israel; and his goings forth were from the beginning, even from eternity.

Ruth (LXX)

1: 1And it came to pass when the judges ruled, that there was a famine in the land: and a man went from Bethlehem (Baithleem) Juda to sojourn in the land of Moab, he, and his wife, and his two sons.
1: 2And the man's name was Elimelech, and his wife's name Noemin, and the names of his two sons Maalon and Chelaion, Ephrathites of Bethlehem (Baithleem) of Juda: and they came to the land of Moab, and remained there.
1: 19And they went both of them until they came to Bethlehem (Baithleem): and it came to pass, when they arrived, that all the city rang with them, and they said, Is this Noemin?
1: 22So Noemin and Ruth the Moabitess, her daughter-inlaw, returned from the country of Moab; and they came to Bethlehem (Baithleem) in the beginning of barley harvest.
2: 4And, behold, Booz came from Bethlehem (Baithleem), and said to the reapers, The Lord be with you: and they said to him, The Lord bless thee.
4: 11And all the people who were in the gate said, We are witnesses: and the elders said, The Lord make thy wife who goes into thy house, as Rachel and as Lia, who both together built the house of Israel, and wrought mightily in Ephratha, and there shall be a name to thee in Bethlehem (Baithleem).

Ezra (LXX: Esdras B)

2: 21The children of Bethlehem (Baithleem), a hundred and twentythree.

Nehemiah (LXX: Esdras B)

7 (17): 26The children of Bethlehem (Baithleem), a hundred and twenty-three: the children of Atopha, fifty-six.