Eastergoa (also Ostergau, Ostergo, or Oostergo) was one of the

Seven Sealands In Frisian historiography, the Seven Sealands (; ) were jurisdictional regions in medieval Frisia. An outgrowth of the origin myths of the Frisians, these divisions were used ideologically to refer to all of Frisia as early as the 14th century ...

and one of the three '' Gaue'' within what is today the province of

Friesland Friesland ( ; ; official ), historically and traditionally known as Frisia (), named after the Frisians, is a Provinces of the Netherlands, province of the Netherlands located in the country's northern part. It is situated west of Groningen (p ...

the Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...

Area

On its west side Eastergoa was bordered by the

Middelsee The Middelzee (Dutch language, Dutch for "middle sea"; ), also called Bordine, was the estuary mouth of the River Boorne (West Frisian: ''Boarn'') now in the Netherlands, Dutch province of Friesland. It ran from as far south as Sneek northward to ...

with

Westergoa Westergoa was one of the Seven Sealands and one of the three that now lie within the borders of today's Dutch province of Friesland. Later it was one of the three goaen of Frisia. In the Middle Ages Westergoa most probably formed the political ...

on the other side of the water. To the south the

Alde Leppedyk Alde may refer to: * Alde Mudflats, nature reserve in Suffolk, England * River Alde, Suffolk, England * Alde Valley School, Leiston, Suffolk, England *Alliance of Liberals and Democrats for Europe Party, a European political party *Alliance of Libe ...

and the Boarn were the border with , and later with (). To the east it was bordered by the

Lauwers The Lauwers () is a river in the Netherlands. It forms part of the border between the provinces of Friesland and Groningen. From the 730s to Widukind's defeat in 785, it was part of the border of the Frankish Empire. The former Lauwerszee an ...

, the Lauwerzee and the

Westerkwartier The Westerkwartier (; ; ; ) is a historical region in the Dutch province of Groningen, at the border with the provinces of Drenthe and Friesland. In the past the area was part of the historical region of Frisia. The West Frisian language ...

of the

Ommelanden The ''Ommelanden'' (; ) are the parts of Groningen province that surround Groningen city. Usually mentioned as synonym for the province in the expression ("city and surrounding lands"). The area was Frisian-speaking, but under the influence ...

(the western portion of the today's

province of Groningen Groningen ( , ; ; ; ) is the northeasternmost province of the Netherlands. It borders on Friesland to the west, Drenthe to the south, the German state of Lower Saxony to the east, and the Wadden Sea to the north. As of January 2023, Groningen ...

1200

The whole of this area belonged to Wininge and

Achtkarspelen Achtkarspelen () is a Municipalities of the Netherlands, municipality in the Provinces of the Netherlands, province of Friesland in the Northern Netherlands. In 2021, it had a population of 27,900. History The name ''Achtkarspelen'', literally me ...

, which was at that point still a part of Eastergoa. Around 1200 Wininge comprised

Dantumadeel Dantumadiel () is a List of municipalities of the Netherlands, municipality in the Provinces of the Netherlands, province of Friesland in the Netherlands. Dantumadiel is a rural municipality characterized by economic activity and agriculture. H ...

Dongeradeel Dongeradeel (; ) is a former municipality in the northern Netherlands. In 2019 it merged with the municipalities of Ferwerderadiel and Kollumerland en Nieuwkruisland to form the new municipality Noardeast-Fryslân. History Dongeradeel was cr ...

and

Ferwerderadeel Ferwerderadiel () is a former Municipalities of the Netherlands, municipality of Friesland in the northern Netherlands. Its official name is West Frisian language, West Frisian, the Dutch name is Ferwerderadeel (). In 2019 it merged with the munici ...

( and ) in the north and ,

Leeuwarderadeel Leeuwarderadeel (; ) is a former municipality in the northern Netherlands. Its capital was Stiens. History On 1 January 2018 it merged with the municipality of Leeuwarden. Population centres * Bartlehiem * Britsum * Cornjum * Finkum * Hij ...

and

Tietjerksteradeel Tytsjerksteradiel () is a municipality in the province of Friesland in the Netherlands. It is named after the town of Tytsjerk, whose name is derived from a person named Tiete. Tiete was a daughter of Tryn, after whom the region (Trynwâlden) is n ...

in the south ( and ). Around 1250 it was split into two parts called the '' Noardlike njoggen'' ('northern nine') and the '' Sudlike njoggen'' ('southern nine').

1500

Around 1500 Eastergoa was further divided into two cities and eleven (; municipalities).

Area

1200

1500

See also