Knut Jonsson (Aspenäsätten)

Knut Jonsson (died between 1345 and 1347) was a Swedish knight of the Aspenäs family, the son of Johan Filipsson. Appointed lawspeaker of Östergötland in 1310, he kept the post for nearly four decades and sat on the council of Birger Magnusson and then of Magnus Eriksson, eventually rising to drots, the highest secular office in the realm.

He is last attested in 1345 and was dead by 1347. Eighteenth- and nineteenth-century writers sometimes called him Knut Jonsson Blå, tying him to the legendary Joar Blå, a descent no source supports.