Who was the last ruler of the Tughluq dynasty of the Delhi Sultanate?

The final ruler of the Tughlaq dynasty was Nasir-ud-din Mahmud (also recorded as Nasir-ud-din Muhammad Shah), who ruled in the closing years of the dynasty and whose reign extended to around 1412–1413. Sources identify him explicitly as the last Tughlaq sovereign, and his reign encompassed the catastrophic invasion of Timur which fatally weakened Tughlaq authority and paved the way for the Sayyid dynasty to replace the Tughlaqs in Delhi. Chronological accounts name Nasir-ud-din Mahmud as the terminal ruler of the line, with the subsequent political transition occurring under Khizr Khan of the Sayyids after Tughlaq rule ended [2].

Sources

1. [1] History , class XI (Tamilnadu state board 2024 ed.) > Chapter 10: Advent of Arabs and Turks > Timur's Invasion > p. 147
2. [2] https://en.wikipedia.org/wiki/Mahmud_Shah_II