Mohy al-Din, (Arabic: محي الدین ‎) is a male Muslim name composed of the elements Muhyi, meaning reviver and ad-Din, meaning of the faith. It may refer to

Mehdi Hassan Khan (Urdu: مہدی حسن خان ) is a Pakistani ghazal singer and a former playback singer for Lollywood. He is famously known as the 'King of ghazal' (Urdu: شہنشاہِ غزل). He has ruled the Pakistan film industry along with Ahmed Rushdi. He was honoured with Tamgha-e-Imtiaz, Pride of Performance and Hilal-e-Imtiaz by the Government of Pakistan, and Gorkha Dakshina Bahu by the Government of Nepal.

Mehdi Hassan was born on 18 July 1934 in a village called Luna in Rajasthan, India into a family of traditional musicians. He claims to be the 16th generation of hereditary musicians hailing from the Kalawant clan of musicians. Mehdi Hassan had his musical grooming from his father Ustad Azeem Khan and uncle Ustad Ismail Khan who were both traditional Dhrupad singers. Hassan started to perform at a young age and the first concert of dhrupad and kheyal with his elder brother is reported to have been held in Fazilka Bungla, near present DC House (1935) of Undivided Punjab. After the Partition of India, 20-year-old Hassan and his family migrated to Pakistan and suffered severe financial hardships.