- Khuwarizmī, Jamāl al-Dīn Abu Bakr1
- Khvājah Muḥammad Pārsā1
- Khwājakīzādah, Muṣṭafá ibn Muḥammad, d. 15901
- Khāṭirī, Aḥmad ibn Muḥammad1
- Kindī, ʻAmr ibn al-ʻĀṣ1
- Kingdom of England1
- Kirmānī, Muḥammad ibn ʻAlī1
- Koca Ragıp Pasha1
- Konrad III. von Soltau1
- Kuraydī, Aḥmad ibn ḥusayn, 18th cent1
- Kurdī, Yūsuf ibn Yaʻqūb1
- Kurdī, ʻAbd Allāh ibn Muḥammad, d. 16541
- Kātyāyana1
- Kṛṣṇānanda Āgamavāgīśa Bhaṭṭācārya1
- Lamii çelebi1
- Laurent d'Orleans1
- Laurentius Cynthius1
- Leo Archpriest1
- Leo X1
- Leonhard Freisleben1