Historical names, e.g. of people named in inscriptions or of rune-carvers, should in English articles be written in their historical nominative form.
In Old Norse, length markers should be kept, e.g. “Hafgrímr’s letter to Þórir fagr”; in Proto-Nordic and East Norse, authors may choose to drop macrons in names in the running text (e.g. “the rune-carver Asmundr who bears the name Āsmundr.”) or to keep them, but this must be done consistently.
The use of the historical forms in articles in Scandinavian languages and German is also recommended.