Borg

(historical) a mediaeval town in Østfold; modern Sarpsborg


Moss

A town with bystatus and municipality of Østfold, Norway


Skiptvet

It is believed that the first part of the name (Ski-) comes from skagi, Old Norse meaning "raised object", while the last part comes from the word þveit, a common Viking age farm name.


Rømskog

A municipality of Østfold, Norway. To be merged with Aurskog-Høland in Akershus on 1 January 2020, thus becoming a part of that county at the same time.


Halden

A town with bystatus and municipality of Østfold, Norway, which borders onto Sweden.


Hvaler

An island municipality of Østfold, Norway


Hvaler

From Old Norse Hvalir, plural of hvalr (“whale”).


Sarpsborg

First part from Sarp, the name of a waterfall (now Sarpsfossen), from Old Norse Sarpr. Last part from Borg, the original name of the town.

A city and municipality of Østfold, Norway

Sarpsborg
nn:Sarpsborg
nn:Sarpsborg kommune


Fredrikstad

A municipality of Østfold, Norway, and the seventh-largest city in Norway.

Fredrikstad
nn:Fredrikstad
nn:Fredrikstad kommune


Spydeberg

Danicised form of Old Norse Spjótaberg, from spjót (“spear”) + berg (“cliff, rock”).

Spydeberg
nn:Spydeberg
nn:Spydeberg kommune


Nordby

From Old Norse Norðbýr, from norðr + býr.

A common farm name:
A farm in Aremark, Østfold, Norway

A farm in Berg parish, Halden, Østfold, Norway

A farm in Eidsberg parish, Indre Østfold, Østfold, Norway

A farm in Idd parish, Halden, Østfold, Norway

A farm in Tune parish, Sarpsborg, Østfold, Norway

A farm in Svindal parish, Våler, Østfold, Norway

A common farm name:
A farm in Våler, Østfold, Norway


Asperen

Definite form; from Old Norse *Aspir, an ia-derivation of ǫsp f (“aspen”).


Bjørnøya

/²bjœnːœʏːa/

A common island name:
An island in Aremark, Østfold, Norway

An island in Rygge, Outer Østfold, Norway

An island in Rømskog, Inner Østfold, Norway


Sarpsburg

de-proper noun

Sarpsburg n (proper noun, genitive Sarpsburgs or (optionally with an article) Sarpsburg)

Sarpsburgs (genitive)
Sarpsburg (genitive with-article)

Adapted borrowing of Norwegian Sarpsborg.

Sarpsborg (a city and municipality of Østfold, Norway)


Gamlebyen

Definite form; from gamleby (“old town”), from gamal (“old”) + by (“town, city”).

A district of Fredrikstad, Østfold, Norway


Onsøy

Originally an island name; from Old Norse Óðinsey, from Óðinn (“Odin, Woden”) + ey (“island”).

A former municipality of Østfold, Norway


Torsnes

From Old Norse Þórsnes, from Þórr + nes.

A village and former municipality of Fredrikstad, Østfold, Norway


Øyeren

→ Swedish: Öjern, Öjeren

→ Danish: Øjeren

Definite form; from Old Norse *Eyir m, from ey (“island”), referring to the sand islands in the northern end, by the delta of the river Glåma.


Sarp

(definite form) A waterfall in Sarpsborg, Østfold, Norway


Jeløy

From the first part of the old island name Jalund + øy (“island”).

(definite form) An island in Moss, Outer Østfold, Norway


Jalund

From Old Norse Jǫlund, Jalund, possibly from the fjord name *Jali + -und. Cognate with Icelandic Jölund.

(obsolete) An island in Moss, Outer Østfold, Norway. Official name: Jeløy(a)


Øgderen

Definite form; from Old Norse *Ygðir m, an ia-derivation, possibly of the river name *Yggja.