Darrah Bajin was a Bajoran male who was the son of Darrah Mace and Darrah Karys. He was the elder brother of Darrah Nell.
In 2318, Bajin attended the Korto Gratitude Festival with his parents when he bought buns and ate them all without giving any to his family, much to his father's surprise. Bajin was also present in 2323 when his mother decided to leave Bajor and take him and his sister with her. When his father finally arrived on Valo II in 2328, Bajin and Nell were so excited to see their fathers they ran to him. (ST - Terok Nor novel: Day of the Vipers)
In 2369, Darrah returned to Bajor, after the Cardassian Occupation ended, with his wife Cheren and two sons. (ST - Terok Nor novel: Dawn of the Eagles)
In 2371, Darrah informed Rugal Pa'Dar of the death of his Bajoran adoptive father Proka Migdal. (DS9 novel: The Never-Ending Sacrifice)