This interpretation of "Vinland" as "pasture-land" rather than "wine-land" was accepted by Valter Jansson in his classic 1951 dissertation on the "vin"-names of Scandinavia, by way of which it entered popular knowledge in the later 20th century. It was rejected by Einar Haugen (1977), who argued that the "vin" element had changed its meaning from "pasture" to "farm" long before the Old Norse period. Names in "vin" were given in the Proto Norse period, and they are absent from places colonized in the Viking Age. Haugen's basis for rejection has since been challenged.