| Donald II | |
|---|---|
 | |
| King of the Picts / King of Alba | |
| Reign | 889 – April 900 |
| Predecessor | Giric |
| Successor | Constantine II |
| Born | c. 30 June 862 Fordoun, Aberdeenshire |
| Died | April 900 Forres, Moray |
| Burial | |
| Issue | Malcolm I, King of Alba |
| House | Alpin |
| Father | Constantín mac Cináeda, King of the Picts |
Domnall mac Causantín (Modern Gaelic: Dòmhnall mac Chòiseim, IPA:[ˈt̪oːvnəɫ̪ˈmaʰkˈxoːʃɪm]),[1] anglicised as Donald II (died 900), was King of the Picts or King of Alba in the late 9th century. He was the son of Constantine I (Causantín mac Cináeda). Donald is given the epithet Dásachtach, "the Madman", by The Prophecy of Berchán.[2]
Donald usurped the throne from his cousin, Giric in 889 who killed his uncle Àed Mac Cináeda(r.877-879). He continuously fought the Vikings in The North, winning victories but would be killed in 900 at War, possibly against King Harald Fairhair. He was succeeded by his cousin Caustantín Mac Àeda (Constantine II)
- ^ Domnall mac Causantín is the Mediaeval Gaelic form.
- ^ ESSH, p. 358; Kelly, Early Irish Law, pp. 92–93, 308: "The dásachtach is the person with manic symptoms who is liable to behave in a violent and destructive manner." The dásachtach is not responsible for his actions. The same word is used for enraged cattle.