Haydar (Arabic: حيدر), also spelt Hajdar, Hayder, Heidar, Haider, Heydar, Haidr, and other variants, is an Arabic male given name, also used as a surname, meaning "lion".
In Islamic tradition, the name is primarily associated with Ali ibn Abi Talib (first Shia Imam and fourth Rashidun Caliph), the son-in-law and cousin of Muhammad, who was nicknamed "Haydar".
The variants Hyder and Hyderi (Urdu: حیدری) are Urdu variants used predominantly by Muslims in South Asia.
Hajdar
Hajdar Blloshmi (1860–1936), Albanian politician
Hajdar Muneka (1954–2022), Albanian journalist and diplomat
Haydar
Given name
Ali, the son-in-law and cousin of the Islamic prophet Muhammad, said to have been nicknamed "Haydar".
Haydar Pasha, Vizier of Ottoman Empire
Haydar Aşan, Turkish Olympian
Haydar Ergülen, Turkish poet
Haydar Ghazi, second Wazir of Sylhet
Haydar Hatemi, Iranian artist
Haydar al-Kuzbari (1920–1996), Syrian military officer
Haydar al-Sadr (1891–1937), Muslim Iraqi cleric and ayatollah
Haydar Khan e Amo-oghli (1880–1921), revolutionary and military activist in Iran, Republic of Azerbaijan and Central Asia
Haydar Zorlu, Turkish-German actor
Haydar Astrakhani, Khan of Astrakhan from 1538 through 1541.
Haydar Amuli, or Haydar al-'Obaydi al-Husayni Amoli, a Shi'ite mystic and Sufi philosopher
Middle name
Ali Haydar Şen (born 1939), Turkish businessman
Mohammed Haydar Zammar (born 1961), Syrian Muslim jihadist and al-Qaida recruiter
Surname
Darren Haydar (born 1979), Canadian professional ice hockey player
Kamal Haydar (1933–1980), Yemeni short story writer
Paula Haydar (born 1965), American academic and translator
Qutb ad-Dīn Haydar, Persian Sufi saint
Shaykh Haydar (1459–1488), a religious leader of the Safaviyya from 1460 to 1488
Sultan Haydar (born 1987), Turkish female long-distance runner of Ethiopian origin
Haidar
Haidar Haidar (1936–2023), Syrian writer and novelist.
Ibrahim Haidar (1867–1974), Lebanese politician
Salim Haidar (1911–1980), Lebanese politician
Haider Abbas Rizvi (born 1968), Pakistani Politician
Hayder
Hayder Ali (1720 - 1782) Founder of Mysore Sultanate and Father of Tipu Sultan