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.)