Sisillius II
legendary king of the Britons
Sisillius II (Welsh: Seisyllt map Kyhylyn) was a Legendary King of the Britons as recounted by Geoffrey of Monmouth. He came to power in 373BC.
Legendary account
Sisillius II was the son of King Guithelin and Queen Marcia, succeeded by his son Kinarius. Since his father, Guithelin, died when Sisillius was just seven years of age, his mother, Queen Marcia ruled Britain for about five years in his stead as Queen regent. Upon her death, c. 358 BC, Sisillius came to the throne, ruling for the next six years.
His reign was followed by those of his sons Kinarius and Danius.
The public source identifies “Sisillius II” as legendary king of the Britons. This brief keeps that definition visible, then builds a research path around Sisillius, legendary and king.
Why this record matters
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Biographical claims are most persuasive when dates, appointments and relationships can be traced to records created close to the events described. The source revision retrieved here is dated Sep 15, 2024. The linked authority identifier is Q587893. None of the 0 selected statements returned an explicit reference.
A concise life account rarely captures disputed attribution, private networks or the changing language used to describe a career. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Sisillius II” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.