Joseph born
After years of barrenness, Rachel gave birth to Joseph, Jacob's eleventh son and his favorite.
She named him Joseph, saying, “May Yahweh add another son to me.”
Genesis 30:24 (World English Bible)
Rachel had watched her sister and both servants give Jacob ten sons. When God finally opened her womb, she named her son Joseph, meaning “he adds,” and asked God for another.
Dating notes
Joseph was 30 before Pharaoh (Genesis 41:46) and 39 when Jacob arrived in Egypt at 130 (Genesis 45:6; 47:9), so Jacob was 91 at Joseph's birth.