Umar Xayyom — Nabi Jaloliddin

Ummar Xayyom (taxallusi; asl ism-sharifi G‘iyosiddin Abulfath Umar ibn Ibrohim Xayyom Nishopuriy) (1048.18.5, Nishopur – 1131.4.12) – matematik, astronom, faylasuf, hakim,fizik va mutafakkir shoir. Nishopurda boshlangich ma'lumotni olgach, Balx, Buxoro va Samarqandda tahsil ko‘rgan.