And afterwards she bare a daughter, and called her name Dinah. And called her name Dinah - דינה dinah, judgment. As Rachel had called her son by Bilhah Dan, Genesis 30:6, so Leah calls her daughter Dinah, God having judged and determined for her, as well as for her sister in the preceding instance.
Related Commentaries of Genesis 30:21
Genesis 30:21
21 And afterwards she bare a daughter, and called her name Dinah.f