State · 920 – 1197

Kingdom of Deheubarth

A state of 920 – 1197 — 277 years in Europe. It followed Kingdom of Dyfed, Kingdom of Seisyllwg and Kingdom of Brycheiniog. It was followed by Principality of Wales. The atlas records 5 things within it — people 5. Its line of rulers holds 7 people.

For the full story, the article on Wikipedia (CC BY-SA 4.0); this page holds what the record says of the state.

Stood: 277 years; 920 – 1197
Rulers: 7; the King of Deheubarth
Within it: 5; recorded rows

Where it sits in time

Five thousand years, 3000 BCE to 2026; the state in gold, what it replaced or followed and what replaced or followed it in grey.

Before and after

The states the record files it as replacing or following, and those that replaced or followed it - Wikidata's own statements, each read from this state's side.

Before it

Kingdom of Seisyllwg · follows · 680 – 920
Kingdom of Brycheiniog · follows · 450 – 1045
Kingdom of Dyfed · follows · 410 – 920

After it

Principality of Wales · followed by · 1216 – 1542

Rulers

The line of King of Deheubarth.

killed, executed or dead in battledied in officeleft alive by a regular roada second row: a reign that began before the last had ended — rival claimants, or a shared throne

Ruler	Reign	Length	How it ended · source	To the ruler before
Hywel Dda	920 – 950	30 years	died in office, manner not recordedread off the dates alone
Owain ap Hywel Dda	950 – 987	37 years	left office aliveread off the dates alone	child
Maredudd ab Owain	986 – 999	13 years	died in office, manner not recordedread off the dates alone	child
Cynan ap Hywel	999 – 1003	4 years	left office aliveread off the dates alone
Gruffudd ap Llywelyn	1055 – 1063	8 years	died in office, manner not recordedread off the dates alone
Maredudd ab Owain ab Edwin	1063 – 1072	9 years	killed, the article saysread from the ruler's own article
Rhys ab Owain	1072 – 1078	6 years	killed, the article saysread from the ruler's own article	sibling

7 rulers, 7 with terms dated as terms, covering 920 – 1078. Median reign 9 years. 2 of 6 handovers irregular - a killing, a deposition, a rival claimant, a rising or a coup beside it. A blank in the last column means no kin on record, which is coverage, never “unrelated”.

What happened within it, by century

Every row the atlas hosts under this state, by the century it began in: wars and battles in red, risings, regime changes and massacres beside them, everything else in grey. A tall bar is a century the record is full for, which is partly a fact about Wikipedia.

900 – 9992 rows

Owain ap Hywel Dda · ruler · 950 – 988
Maredudd ab Owain · ruler · 938 – 999

1000 – 10992 rows

Rhys ab Owain · ruler · 1001 – 1078
Maredudd ab Owain ab Edwin · ruler · 1050 – 1072

Among all states

Each measure against the states that carry it, never against all of them: a bar is the share of those states below this one.

How long it stood277 years
stood longer than 71% of 3,187 states with a recorded end or still standing.
Wars recorded per centurynone
had more wars on record per century than 44% of 3,187 states, counting the wars the atlas hosts under each.
How long a reign lasted, at the median9 years
had longer reigns, at the median, than 31% of 967 states whose dated line can carry a median.
Rulers on record7
has more rulers on record than 73% of 1,968 states with a line of rulers.

What led to it, and what came of it

The investigation's own picture: 3 causes the record names and 1 result, the strongest six of each at their own years, joined to the state by the kind of claim - a recorded statement solid, the article's sentence dashed, a theory dash-dot.

linked

Open the investigation: every row with its evidence, the conditions at the time, the theories condition by condition, and the succession analysed.

Open in the atlas

On the timeline, 892 – 1225, with everything that stood beside it.
On the map in 1059, live: scrub the year and watch its borders move.
Investigate it: what led to it, what came of it, and its succession analysed.

Wikidata Q837136 (CC0) · data built 2026-10-06 · Pastlas v2.9.1, by Oleh Voronko. The published atlas and its data are for non-commercial use.