According to the description of Mahābhārata (Mahabharata), Īlina(Ilina) was the son of king Taṁsu (Tamsu), belonging to Puruvaṁśa (Puruvamsa; the genealogical line of Puru). Īlina was born of the womb of Kālindī (Kalindi), Taṁsu’s wife. Īlina’s wife was Rathantarī (Rathantari). Īlina and Rathantarī had five sons: Duṣyanta(Dushyanta) was the eldest among them. The other four sons were Śūra (Sura), Bhīma (Bhima) , Pravasu and Vasu, respectively. After Īlina, his eldest son Duṣyanta ascended the throne.
In Vāyupurāna (Vayupurana), Ilina (with hrasva i-kāra) has been mentioned as the son of King Trasu of Puruvaṁśa. And according to the reading of Vāyupurāṇa, Duṣyanta was not the eldest son of Ilina. According to this Purāṇa (Purana; Mythological Scriptures), the four sons of Ilina, in respective order, are as follows: Suṣyanta (Sushyanta), Duṣyanta (Dushyanta), Pravīra (Pravira), Anagha.
Viṣṇupurāṇa (Vishnupurana) refers to this Īlina as Ailina.