Nils Fredrik Røn(n)beck (, March 22, 1820 - January 4, 1891) was a Swedish-Norwegian polar skipper and ice pilot. He discovered Franz Josef Land in 1865.

Life

Rønnbeck was born Nils Johansson Söderlund in Storön in Kalix, in Norrbotten County, Sweden, the third child of Johan Olofsson Söderlund and Anna Lisa Olofsdotter. In 1830 the family moved from Storön to Kamlunge, also located in Kalix,

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