Nemanjici Serbian dynasty; shall be deemed to originate from Stefan Nemanja, although his ancestors had already ruled Raska as a great mayors; dynasty ruled the Serbian lands continuously in the period 1168 - 1371. She has two lines: one comes from the older son of Nemanja Vukana, and another royal, comes from the middle son Stefan Nemanja Crowned, while Nemanja's son Sv. Sava had birth.

source: http://www.zaduzbine-nemanjica.rs/Djurdjevi-Stupovi/index.htm