Person

Caustantín mac Fergusa

d. 820 · 9th century · Also known as Constantine son of Fergus

Caustantín mac Fergusa was king of the Picts from 789 to 820 and probably also controlled Dál Riata. He is traditionally credited with founding the church at Dunkeld, and the Dupplin Cross near Forteviot carries his name. His family, including his brother and successor Óengus II, dominated northern Britain until the Viking victory of 839.

Caustantín mac Fergusa
Image: Patricia Steel · CC BY-SA 2.0 · Wikimedia Commons

Mentioned in 1 state history

Kingdom of Fortriu

See also

Cite this entry
APA
The Epoch Institute. (2026). Caustantín mac Fergusa. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/caustantin-mac-fergusa
MLA
“Caustantín mac Fergusa.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/caustantin-mac-fergusa. Accessed .
Chicago
The Epoch Institute. “Caustantín mac Fergusa.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/caustantin-mac-fergusa.
Harvard
The Epoch Institute (2026) ‘Caustantín mac Fergusa’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/caustantin-mac-fergusa (Accessed: ).

Last reviewed October 2026Random entry ↻