The first reference to this clan is found in
Mahavamsa, appearing during the reign of
King Ilanaga. According to the Mahavamsa, the Lambakarna were royal attendants. They accompanied the king to Thisawewa. Upon returning from their journey, the Lambakarnas had left the king alone. In response to their dereliction, Ilanaga employed the Lambakarnas to menial labour under the supervision of the
Chandalas, an 'untouchable' caste. In response, the Lambakarnas revolted and usurped the throne. Ilanaga eventually managed to take the throne back. With the rule of King Vasabha, the Lambarkanas were established as a ruling dynasty. According to
Kotte era sources, the Lambakarna is related to the clan that was entrusted to protect the Sri Maha Bodhi tree. King Vasabha began Lambakarna rule over the
Anaradhapura Kingdom in 65 CE. They ruled for four centuries until the
Pandyan invasion of Sri Lanka. ==References in Inscriptions and literature==