Kalki

Kalki is the prophecised avatar or incarnation of Lord Vishnu. He is the last of the 10 major incarnations (Dashavatar) of Lord Vishnu, who is claimed to bring an end to Kali Yuga.

In the Vedas
It is mentioned in the Padma Purana that Kalki will gather all brahmanas and 'propound the highest truth'. He will also be awarded the weapon by Lord Shiva. Kalki must fulfil the prophecy of Lord Shiva as mentioned in the Kalki Purana.

It is also written in Kalki Purana that wife of Kalki, Padma would be from Simhala Island. Because Kalki mythology is prevalent in India, so if Kalki would be an Indian, then wife of Kalki should be a foreigner from either an island country or a country which has island as its parts.

He is also, to be trained by Parasurama, one of the greatest warriors of all time, who dwells in the Himalayas. He is said to destroy all evil in the world, making way to the Maha Pralaya, so that the cycle of existence continues.

Etymology
It is believed that the word 'Kalki' is derived from the word, 'Kali Yuga', which is the end of the four yugas￼.￼