Nakholmen
Nakholmen (also spelled Nakkholmen) is an uninhabited island in the inner part of Oslofjord, in the municipitality of Oslo. It is located west of Lindøya and southeast of Bygdøy. The island has more than 180 weekend cottages.

The name
The first element is nakke ('(nape of the) neck') - the last element is the finite form of holme ('islet'). The name is referring to a rock formation on the islet. (See also Hovedøya.)

References

Islands of Oslo
Uninhabited islands of Norway