Udai Singh I aka Udaikaran or Udah, was the Maharana (r. 1468 – 1473) of Mewar Kingdom. He was a son of Maharana Kumbha. When Rana Kumbha was offering prayers to Eklengji (Lord Siva), Udai Singh I assassinated him and proclaimed himself the ruler. He was a cruel ruler so in 1473 he was assassinated by his brother Raimal who became the Rana after him.

Born to one of the most celebrated heroes of Mewar, Rana Kumbha, the undefeated Maharana; Prince Uda, or Udai Singh is one of the most despised sons of Mewar.Being the heir to Rana Kumbha, his ascension to the  throne was imminent. But the power driven young Udai Singh failed to wait to pave his way towards the throne. In an act of patricide, he killed his own father Rana Kumbha; while he was offering prayers to his deity, Lord Eklingji.

With the sad demise of its hero, Mewar was thwarted. Udai Singh proclaimed himself as the new king and came to power. He ruled Mewar for a small span of five years; till he was defeated by his own brother Raimal and had to flee from Mewar. He was a feeble ruler and because of his incompetency, Mewar lost the territories of Abu and Ajmer. He fled to Delhi and offered his daughter to the Sultan of Delhi in marital alliance in return for his support. But fate had its own plans and Udai Singh was struck by lightning before the marriage, and died on the spot.

The legacy of the Suryavanshi kings of Mewar was tarnished by their own son and such was the hatred that many omitted him from the genealogies of Mewar. He was nicknamed ‘murderer’ and the condemned Rana Udai Singh was diluted in the history.