Ghiyath al-Din (), also transcribed as Ghiyāthu'd-Dīn, Ghiyasuddin, etc. is the name of many persons in the Islamic world. It may refer to: People Ghiyath ad-Din Muhammad Tapar, better known as Muhammad I (Seljuq sultan) (died 1118) Ghiyath al-Din Abu'l-Fath Umar ibn Ibrahim Al-Nishapuri al-Khayyami, better known as Omar Khayyam, (1048–1131), Persian scientist and poet Ghiyath al-Din Muhammad (fl. 1176–1200), ruler of the Ghorid dynasty in Khorāsān Ghiyasuddin Iwaj Shah, (fl. 1210), ruler of Bengal Ghīyāth al-Dīn Kaykhusraw bin Qilij Arslān, or Kaykhusraw I (died 1211), Seljuk Sultan of Rum Ghīyāth al-Dīn Kaykhusraw bin Kayqubād, or Kaykhusraw II (died 1246), Seljuk Sultan of Rum Ghīyāth al-Dīn Kaykhusraw bin Qilij Arslān, or Kaykhusraw III (died 1284), Seljuk Sultan of Rum Ghiyas ud din Balban, (1200–1287), Turkic ruler of the Delhi Sultanate Ghiyath al-Din Tughluq, (died 1325), founder of the Muslim Turkic Tughluq dynasty in India Ghiyasuddin Bahadur Shah, (died 1328), ruler of Bengali kingdom of Lakhnauti Ghiyas al-Din ibn Rashid al-Din, (died 1336), Ilkhanate politician Tughluq Khan, (died 1389), Muslim Turkic ruler of the Tughlaq Dynasty Baysunghur, (1397–1433) son and associate of the Timurid ruler Shah Rukh in Herat Ghiyāth al-dīn Naqqāsh, (fl. 1419–1422), the diarist of a Persian embassy to China Ghiyāth al-Dīn Jamshīd ibn Masʾūd al-Kāshī, or just Jamshīd al-Kāshī (c. 1380–1429), Persian astronomer and mathematician Ghiyasuddin Azam Shah, (1390–1411), third Sultan of the first Iliyas Shahi dynasty of Bengal Ghiyāth al-Dīn ʿAlī Iṣfahānī, fifteenth century, scholar in Badakhshān Ghiyath Shah, (1469–1500), second Sultan of the Khilji dynasty of Malwa Ghiyasuddin Mahmud Shah, (deposed 1538), last sultan of the Hussain Shahi dynasty of Bengal Ghiyasuddin Jalal Shah (died 1563), ruler of Bengal Muhammed Ghiya'as ud-din (fl. 1766–1773), Sultan of the Maldives Musa Ghiatuddin Riayat Shah of Selangor (1893–1955), Sultan of Selangor Ghayasuddin Siddiqui (born 1939?), British academic and political activist Ghias-ud-din of Qazvin, 16th century Persian noble (born 1947), Iranian Shia Cleric Places Ghiyasuddin International School, Malé, Maldives. – School named after Sultan Muhammed Ghiya'as ud-din. Arabic masculine given names