Nasr II, ruler (amir) of the Samanid Empire (born 906)

Nasr ibn Ahmad or Nasr II, nicknamed "the Fortunate", was the ruler (amir) of Transoxiana and Khurasan as the head of the Samanid dynasty from 914 to 943. His reign marked the high point of the Samanid dynasty's fortunes. He was the son of Ahmad ibn Isma’il.

Emir, also transliterated as amir, is a word of Arabic origin that can refer to a male monarch, aristocrat, holder of high-ranking military or political office, or other person possessing actual or ceremonial authority. The title has a history of use in West Asia, East Africa, West Africa, Central Asia, and South Asia. In the modern era, when used as a formal monarchical title, it is roughly synonymous with "prince", applicable both to a son of a hereditary monarch, and to a reigning monarch of a sovereign principality, namely an emirate. The feminine form is emira, with the same meaning as "princess".

The Samanid Empire was a Persianate Sunni Muslim empire, ruled by a dynasty of Iranian dehqan origin. The empire was centred in Khorasan and Transoxiana, at its greatest extent encompassing northeastern Iran and Central Asia, from 819 to 999.