Jacob married two women are Leah and Rachel, but the person Jacob truly love is Rachel.
When Lord saw Leah was unloved, he made her give birth four kid for Jacob, while Rachel can't give birth. then Leah name them are Reuben, Simeon, Levi, and Judah
Reuben, Simeon, Levi and Judah
Because Rachel can't give birth for Jacob, so she told Jacob "Here is my maidservant Bilhad. Have intercourse with her, and let her give birth on my knees, so that I too may have children through her". So Jacob and Rachel have two son name Dan and Naphtali (actually Bilhah's kids).
Dan and Naphtali
When Leah saw that Rachel have two sons and Leah know that she can't bear a child so she gave her maidservant to Jacob as wife. Leah maidservant is Zilpah, Zilpah gave birth two boys and name them are Gad and Asher.
Gad and Asher
Then Leah conceives with Jacob again and gives birth three more kids for Jacob. Their names is Issachar, Zebulun and the first Jacob daughter is Dinah.
Issachar, Zebulun and Dinah
At the end, Rachel prays to God, God listened to her and made her fruitful. Rachel conceived and give birth a boy and name him Joseph. Joseph became Jacob favorite son.