|Covid-19|Saxon Wars: King Charlemagne spends Easter in Nijmegen, and leads a large Frankish army to Paderborn, where a general assembly of Carolingian and Saxon leaders has been summoned. Saxon lands are integrated into the Frankish Kingdom, and divided into missionary parishes. Duke Widukind and his followers flee to King Sigfred of Denmark, seeking refuge and support.
Abbasid–Carolingian alliance: Charlemagne receives a request for support from pro-Abbasid rulers in the eastern thughur, or military frontier zone of the Emirate of Córdoba, to help against an rebellion led by the Umayyd emir Abd al-Rahman I.
Abd al-Rahman ibn Rustam is recognized as imam of the Ibadis in Maghreb (western North Africa).
Duke Tassilo III of Bavaria founds Kremsmünster Abbey (modern Austria). During this period, the Tassilo Chalice is possibly donated by Luitpirga, wife of Tassilo (approximate date).
Bernard, archbishop of Vienne (d. 842)
Bertha of Toulouse, wife of Pippin of Italy
Heungdeok, king of Silla (Korea) (d. 836)
Ishaq ibn Rahwayh, Muslim imam (or 778)
Masawaiyh, Assyrian physician (d. 857)
Pippin of Italy, son of Charlemagne (or 773)
Feardomhnach, abbot of Tuam (Ireland)
Flaithrí mac Domnaill, king of Connacht (Ireland)
Fujiwara no Kiyonari, Japanese nobleman (b. 716)
Fujiwara no Yoshitsugu, Japanese statesman (b. 716)
Ibrāhīm al-Fazārī, Muslim astronomer
Telerig, ruler (khagan) of Bulgaria
Waermund, bishop of Worcester
Walpurga, Anglo-Saxon missionary (or 779)
Year 777 (DCCLXXVII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. The denomination 777 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.