Turvasu Druhyu and Anu dynasties

According to Hindu mythology, King Yayati surreptitiously married the daitya princess and his wife Devayani's maid, Sharmistha, after she begged him to bear her children.

When Yayati begged him to temper the curse, the sage consented, allowing him to exchange its consequences with one of his sons.

After a thousand years of enjoying the sensual company of his wives, Yayati named Puru his heir and retired to the forest.

[1][2] The Vishnu Purana states that as they had refused to accept their father's curse, Turvasu, Druhyu, and Anu received smaller regions of Yayati's domains to rule for themselves.

[4] Yadu, the first son of Yayati from Devayani, went on to form a cadet branch named the Yaduvamsha due to being stripped of his heirdom, while Puru, his youngest son from Sharmishtha and eventual heir, continued the main line of the Lunar dynasty, which later also came to be known as Puruvamsha.