1040 deaths

Persian physicist, mathematician and astronomer (c. 965 – c. 1040)

King of England from 1035 to 1040

king of Scots from 1034 to 1040

Count of Anjou

Duke of Brittany

Ruler of the Ghaznavid Empire

Persian poet

Abu Najm Aḥmad ibn Qauṣ ibn Aḥmad Manūčihrī (), a.k.a. Manuchehri Dāmghānī (fl. 1031–1040), was an eleventh-century court poet in Persia and in the estimation of J. W. Clinton, 'the third and last (after ʿUnṣurī and Farrukhī) of the major panegyrists of the early Ghaznawid court'. Among his poems is "The Turkish harpist".

French nobleman

thumb|Qajar Iran|Qajar-era miniature of the poets [[Ferdowsi, Unsuri and Asjadi]] Abu Nazar ʿAbdul ʿAziz bin Mansur ʿAsjadi () was a 10th-11th century royal Persian poet of the Ghaznavid empire located in the Ghazni province of today's Afghanistan.

French nobleman (1000-1040)

Byzantine general

Bulgarian nobleman

Norman noble

ghaznavid commander

Counts of Perche

Persian statesman

Count of Empuries

Norman nobleman

Imam of the Zaidi state in Yemen (died 1040)

Begtoghdi (; meaning “a prince has been born, has arisen”), also known by the Persianized form as Baktoghdi (), was a Turkic slave commander who served under the early Ghaznavid rulers, but later fell out of favor and was executed.