Eastergoa (also Ostergau, Ostergo, or Oostergo) was one of the seven areas and one of the three Gaue within what is today the province of Friesland in the Netherlands.

Eastergoa in the Frankish realm (in the Middle Ages
The flag of Eastergoa.

Area

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On its west side Eastergoa was bordered by the Middelsee with Westergoa on the other side of the water. To the south the Alde Leppedyk and the Boarn were the border with Bornegoa [fy; nl], and later with Sânwâlden [fy; nl; nds-nl] (Dutch: Zeuvenwoolden). To the east it was bordered by the Lauwers, the Lauwerzee and the Westerkwartier of the Ommelanden (the western portion of the today's province of Groningen).

1200

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The whole of this area belonged to Wininge and Achtkarspelen, which was at that point still a part of Eastergoa. Around 1200 Wininge comprised Dantumadeel, Dongeradeel and Ferwerderadeel (West Frisian: Dantumadiel, Dongeradiel and Ferwerderadiel) in the north and Idaarderadeel [nl; fy], Leeuwarderadeel and Tietjerksteradeel in the south (West Frisian: Idaarderadiel, Ljouwerteradiel and Tytsjerksteradiel). Around 1250 it was split into two parts called the Noardlike njoggen ('northern nine') and the Sudlike njoggen ('southern nine').

1500

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Around 1500 Eastergoa was further divided into two cities and eleven grietenijen (West Frisian: gritenijen; municipalities).

  The eleven grietenijen of Eastergoa
Number Dutch name West Frisian name
1 Leeuwarderadeel Ljouwerteradiel
2 Ferwerderadeel Ferwerderadiel
3 Westdongeradeel West-Dongeradiel
4 Oostdongeradeel East-Dongeradiel
5 Kollumerland Kollumerlân
6 Achtkarspelen
7 Dantumadeel Dantumadiel
8 Tietjerksteradeel Tytsjerksteradiel
9 Smallingerland Smellingerlân
10 Idaarderadeel Idaarderadiel
11 Rauwerderhem Raerderhim
The two cities
Letter Dutch name West Frisian name
Lw Leeuwarden Ljouwert
Stadsfries: Liwwadden
D Dokkum

See also

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