- Substance (Philosophy)1
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- Suhrawardī, ʻUmar ibn Muḥammad, 1145-1234. ʻAwārif al-maʻārif1
- Sulamī, ʻIzz al-Dīn ʻAbd al-ʻAzīz ibn ʻAbd al-Salām, approximately 1182-12621
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- Superantio, Jacobus, active 15611
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