A gotta, mentioned in the Chronicles as being among the inhabitants of Ceylon. The Lambakannas had, probably, certain duties to perform in connection with the consecration of a king. This was perhaps the reason why Parakkamabáhu I. gave them a prominent place in the ceremonies held in honour of the Tooth Relic (Cv.lxxiv.213); see also below, in the text.
We find that Ilanága, when be went to take his ceremonial bath in Tissavápi, was enraged on finding that the Lambakanná were not there. As a punishment, he ordered them to work at the remaking of a road along the bank of the tank, leading to the Mahá Thúpa, and set candalas to supervise them. Full of anger, the Lambakannas rose in revolt and seized the throne. Three years later the king returned from exile, and, having defeated the Lambakannas, made them drag his chariot in triumphal procession. When he proposed to behead them his mother intervened, and he contented himself with having their noses and toes cut off (Mhv.xxxv.18ff).
The Lambakannas were evidently a powerful clan, and several members of the clan ruled as kings of Ceylon - e.g., Vasabha, Sanghatissa, Sanghabodhi and Gothábhaya, the last three of whom came from Mahiyangana and seized the throne from Vijayakumára (Mhv.xxxvi.58ff). Between the reign of Kittisirimegha and the Coliyan conquest in 1017 A.C. i.e., between the third and the eleventh centuries out of thirty six kings who occupied the throne of Ceylon the majority belonged to either the Moriyá or the Lambakanná. A clan of Lambakannas lived also in South India in the twelfth century. When Lankápura, acting under the orders of Parakkamabáhu I., crowned Vírapandu as king of Pandu, three Lambakanna chiefs were asked to carry out "the duties of the Lambakannas" (Lambakannadhuram) (Cv.lxxvii.27f).
The name may have had a totemistic origin, but according to some Singhalese Chronicles (E.g., the Saddharmaratnákara and the Párakumbá-Sirita) the Lambakannas of Ceylon were a branch of the Moriyas. They claimed descent from Sumitta - a prince of the Moriyan clan, who formed one of the escort that brought the Bodhi-tree from India - and Sumaná, a princess of the same race, who was at one time a nun, ordained under Sanghamíttá. According to these Chronicles most of the kings of Ceylon down to the time of Parakkamabáhu VI. were scions of this clan.
In Ceylon, the Lambakannas had settlements in Rohana. See, e.g., AA.i.262.