- Jiménez de Enciso family1
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- Jiménez de Enciso, Diego1
- Jiménez de Enciso, Pedro1
- John, Duke of Burgundy, 1371-14191
- John, the Apostle, Saint1
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- Juana, of Austria, Princess of Portugal, 1535-15731
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- Khabbāzī, ʻUmar ibn Muḥammad, 1231 or 1232-1292. Mughnī fī uṣūl al-fiqh1
- Khaṭīb al-Baghdādī, Abū Bakr Aḥmad ibn ʻAlī, 1002-1071. Asmāʼ al-mubhamah fī al-anbāʼ al-muḥkamah1
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