If we look only at contemporaneous written evidence and disregard kings, Iarlabanki Ingefastson is probably the most copiously documented Scandinavian of the Viking Period. But his name does not occur even once on vellum. His memory lives entirely in the many rune stones he commissioned.
Iarlabanki (Jarlabanke in modern Swedish) was a major landowner in Uppland north of Stockholm, and his lifetime happened to coincide with the great mid-to-late-11th century rune stone craze in that province. Iarlabanki was a Christian, probably only of the third generation, and like other monuments of the time, his testify to this faith. The inscriptions also commemorate projects like the building of roads, causeways and an assembly site, and state that Iarlabanki administered a territory corresponding to several Medieval parishes. This suggests that he was a royal bailiff and/or military officer.
Famed runologist and Custodian of Ancient Monuments Sven B.F. Jansson (Run-Janne, “Johnny Runes”) lived to see the rediscovery of several of Iarlabanki’s rune stones. Regarding the one that reports the man’s death, Jansson quipped, “After studying Iarlabanki’s rune stones for so long, we were all very sad to learn that he has passed away!”