The origin of the name Leah is Hebrew
This is how Leah is written in Hebrew:
לֵאָה = Le’ah
The biblical meaning of the name Leah is weary.
Leah was the first wife of Jacob, and mother of Reuben, Simeon, Levi, Judah, Issachar, Zebulun, and Dinah
The name Leah appears in the bible in the following verses:
Genesis 29:16 KJV
And Laban had two daughters: the name of the elder was לֵאָה (Leah), and the name of the younger was Rachel.
Genesis 29:17 KJV
לֵאָה (Leah) was tender eyed; but Rachel was beautiful and well favoured.
Genesis 29:23 KJV
And it came to pass in the evening, that he took לֵאָה (Leah) his daughter, and brought her to him; and he went in unto her.
Genesis 29:24 KJV
And Laban gave unto his daughter לֵאָה (Leah) Zilpah his maid for an handmaid.
Genesis 29:25 KJV
And it came to pass, that in the morning, behold, it was לֵאָה (Leah): and he said to Laban, What is this thou hast done unto me? did not I serve with thee for Rachel? wherefore then hast thou beguiled me?
Genesis 29:30 KJV
And he went in also unto Rachel, and he loved also Rachel more than לֵאָה (Leah), and served with him yet seven other years.
Genesis 29:31 KJV
And when the LORD saw that לֵאָה (Leah) was hated, he opened her womb: but Rachel was barren.
Genesis 29:32 KJV
And לֵאָה (Leah) conceived, and bare a son, and she called his name Reuben: for she said, Surely the LORD hath looked upon my affliction; now therefore my husband will love me.
Genesis 30:9 KJV
When לֵאָה (Leah) saw that she had left bearing, she took Zilpah her maid, and gave her Jacob to wife.
Genesis 30:10 KJV
And Zilpah לֵאָה (Leah)‘s maid bare Jacob a son.
Genesis 30:11 KJV
And לֵאָה (Leah) said, A troop cometh: and she called his name Gad.
Genesis 30:12 KJV
And Zilpah לֵאָה (Leah)‘s maid bare Jacob a second son.
Genesis 30:13 KJV
And לֵאָה (Leah) said, Happy am I, for the daughters will call me blessed: and she called his name Asher.
Genesis 30:14 KJV
And Reuben went in the days of wheat harvest, and found mandrakes in the field, and brought them unto his mother לֵאָה (Leah). Then Rachel said to לֵאָה (Leah), Give me, I pray thee, of thy son’s mandrakes.
Genesis 30:16 KJV
And Jacob came out of the field in the evening, and לֵאָה (Leah) went out to meet him, and said, Thou must come in unto me; for surely I have hired thee with my son’s mandrakes. And he lay with her that night.
Genesis 30:17 KJV
And God hearkened unto לֵאָה (Leah), and she conceived, and bare Jacob the fifth son.
Genesis 30:18 KJV
And לֵאָה (Leah) said, God hath given me my hire, because I have given my maiden to my husband: and she called his name Issachar.
Genesis 30:19 KJV
And לֵאָה (Leah) conceived again, and bare Jacob the sixth son.
Genesis 30:20 KJV
And לֵאָה (Leah) said, God hath endued me with a good dowry; now will my husband dwell with me, because I have born him six sons: and she called his name Zebulun.
Genesis 31:4 KJV
And Jacob sent and called Rachel and לֵאָה (Leah) to the field unto his flock,
Genesis 31:14 KJV
And Rachel and לֵאָה (Leah) answered and said unto him, Is there yet any portion or inheritance for us in our father’s house?
Genesis 31:33 KJV
And Laban went into Jacob’s tent, and into לֵאָה (Leah)s tent, and into the two maidservants’ tents; but he found them not. Then went he out of לֵאָה (Leah)‘s tent, and entered into Rachel’s tent.
Genesis 33:1 KJV
And Jacob lifted up his eyes, and looked, and, behold, Esau came, and with him four hundred men. And he divided the children unto לֵאָה (Leah), and unto Rachel, and unto the two handmaids.
Genesis 33:2 KJV
And he put the handmaids and their children foremost, and לֵאָה (Leah) and her children after, and Rachel and Joseph hindermost.
Genesis 33:7 KJV
And לֵאָה (Leah) also with her children came near, and bowed themselves: and after came Joseph near and Rachel, and they bowed themselves.
Genesis 34:1 KJV
And Dinah the daughter of לֵאָה (Leah), which she bare unto Jacob, went out to see the daughters of the land.
Genesis 35:23 KJV
The sons of לֵאָה (Leah); Reuben, Jacob’s firstborn, and Simeon, and Levi, and Judah, and Issachar, and Zebulun:
Genesis 35:26 KJV
And the sons of Zilpah, לֵאָה (Leah)’s handmaid; Gad, and Asher: these are the sons of Jacob, which were born to him in Padanaram.
Genesis 46:15 KJV
These be the sons of לֵאָה (Leah), which she bare unto Jacob in Padanaram, with his daughter Dinah: all the souls of his sons and his daughters were thirty and three.
Genesis 46:18 KJV
These are the sons of Zilpah, whom Laban gave to לֵאָה (Leah) his daughter, and these she bare unto Jacob, even sixteen souls.
Ruth 4:11 KJV
And all the people that were in the gate, and the elders, said, We are witnesses. The LORD make the woman that is come into thine house like Rachel and like לֵאָה (Leah), which two did build the house of Israel: and do thou worthily in Ephratah, and be famous in Bethlehem: