Jon Jarl

{{Short description|Swedish jarl (died c. 1206)}}

{{distinguish|text=Jón Jarl Sørkvisson}}

{{Infobox noble

| name = Jon Jarl

| title = Earl

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| succession = {{ill|Earl of Sweden|sv|Jarl av Sverige}}

| reign = ?–1206

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| predecessor = Johan Sverkersson

| successor = Knut Birgersson

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| other_titles = "Terror of the Heathen"

| noble family = Possibly Sverker

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| birth_name = Jon

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| death_date = c. 1206

| death_place = Asknäs, Ekerö, Sweden

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| burial_place = Linköping Cathedral (disputed)

| occupation = Privateer

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Jon Jarl was a Swedish jarl at the end of the 12th and in the early 13th centuries. He is mentioned in Erik's Chronicle from the 1320s to have spent years fighting against Russians and Ingrians in the early Swedish–Novgorodian Wars.

According to 15th-century historian Ericus Olai, he was murdered at his home in Asknäs in Ekerö parish by the Lake Mälaren in 1206, allegedly by Russian pirates.{{Cite book |last=Line |first=Ph |url=https://brill.com/view/book/9789047419839/Bej.9789004155787.i-700_015.xml |title=Appendix 1. Families And Their Landholdings |date=2007-01-01 |publisher=Brill |isbn=978-90-474-1983-9 |language=en |doi=10.1163/ej.9789004155787.i-700.77}}

According to Erik's Chronicle, Jon Jarl was a Swedish earl in the east tasked with the protection of the kingdom against Russians and Ingrians. Sven Tunberg considers it likely that the earl belonged to the Sverker family and that he was King Sverker the Younger's "Finnish earl" for nine years.[http://kulturarvsdata.se/raa/dokumentation/cae0766d-149a-48bf-a27c-85aee00e9981 Siege of Sigtuna 1187, by Adolf Schück, Fornvännen 215-219]