Arabic name (عثمان) means - "chiropractor". See the name Usman.
Uthman ibn Affan (577 - 20 June 656) was one of the companions of the Prophet Muhammad, one of the four Rightly-Guided Caliphs, along with Abu Bakr, Umar and Ali. He played a major role in early Islamic history as the third of the Sunni Rashidun or Rightly Guided Caliphs. Shiites consider him a usurper.
Uthman was born into the Umayyad clan of Mecca, a powerful family of the Quraish tribe. He was a companion of Muhammad who assumed the role of leader (caliph) of the Muslim Empire at the age of 65 following Umar ibn al-Khattab. Under his leadership, the empire expanded into Fars in 650, some areas of Khorasan (present-day Afghanistan) in 651 and the conquest of Armenia was begun in the 640s. Some of Uthman's notable achievements were the economic reforms he introduced, and the compilation of the Qur'an into the unified, authoritative text that is known today.