Elna Nilsdotter was born in Sellshög

[JoLeen Randolph]

Is Sellshög a farm in Onslunda?

[Judy Olson Baouab]

The Rosenberg CD (made from a book about Swedish place names written in the 1880s) lists a Selshög in Tryde parish, Kristianstads län (county). That particular Selshög is listed on Rosenberg as a by = village.
 
Hopefully the Swedes will be able to provide more examples of where this location can be found.
 
Judy

[Carin Olofsson]

The spelling today is Sälshög, and you find  a map here.

[Jan-Gunnar Tingsell]

Sälshög (former spelling: Selshög) is a very old village, now after a land reform in the 19:th century, a typical agricultural place. It is a place near the village Tomelilla. Onslunda is another village about 6 km away. All belong to the administrative land district Tomelilla.