Editing 1040 (section)

== Deaths ==
* [[January 17]] – [[Mas'ud I of Ghazni|Mas'ud I]], Ghaznavid sultan (b. [[998]])
* [[March 3]] – [[Cunigunde of Luxembourg|Cunigunde]], Holy Roman Empress
* [[March 17]] – [[Harold Harefoot]], king of [[Kingdom of England|England]]<ref>{{cite web |title=Harold I {{!}} king of England |url=https://www.britannica.com/biography/Harold-I |website=Encyclopædia Britannica |access-date=March 15, 2021 |language=en}}</ref>
* [[May 29]] – [[Renauld I, Count of Nevers|Renauld I]], French nobleman
* [[June 21]] – [[Fulk III, Count of Anjou|Fulk III]], French nobleman (b. [[970]])
* [[August 14]] – [[Duncan I of Scotland|Duncan I]], king of [[Kingdom of Scotland|Scotland]]<ref>{{cite book |last1=Cannon |first1=John |last2=Hargreaves |first2=Anne |title=The Kings and Queens of Britain |date=March 26, 2009 |publisher=OUP Oxford |isbn=978-0-19-158028-4 |page=131 |url=https://books.google.com/books?id=FKhB1kiXq7YC&pg=PT131 |language=en}}</ref>
* [[October 1]] – [[Alan III, Duke of Brittany|Alan III]], duke of [[Duchy of Brittany|Brittany]] (b. [[997]])
* [[Abu Hashim al-Hasan]], Zaidi [[imam]] and ruler of [[Jemen]]
* [[Abu Nasr Mushkan]], Persian statesman (or [[1039]])
* [[Ali Daya]], Ghaznavid commander-in-chief, executed
* [[Begtoghdi]], Ghaznavid commander-in-chief, executed
* [[Bertha of Milan]], Lombard duchess (approximate date)
* [[Dietrich I of Meissen|Dietrich I]], bishop of [[Roman Catholic Diocese of Dresden-Meissen|Meissen]] (approximate date)
* [[Gilbert, Count of Brionne]], Norman nobleman (approximate date)
* [[Helias of Cologne]], Irish [[abbot]] and musician
* [[Hugh, Count of Suio|Hugh]], Italian nobleman (approximate date)
* [[Hugh I, Count of Empúries|Hugh I]], count of [[County of Empúries|Empúries]] and [[Peralada]]
* [[Ibn al-Haytham]], Arab [[Astronomy in the medieval Islamic world|astronomer]] (approximate date)
* [[John V of Gaeta|John V]], duke of [[Duchy of Gaeta|Gaeta]] (approximate date)
* [[Maria of Amalfi]], Lombard duchess (approximate date)
* [[Nikephoros Dokeianos]], Byzantine general
* [[Unsuri]], Persian poet and writer (or [[1039]])
* [[Yeshe-Ö]], Tibetan [[lama]]-king (approximate date)