Johann Albert Fredrick Wilhelm Kalsow was born on 4 February 1835, in Pomerania, Prussia, Germany as the son of Michael Fredrick Kalsow and ?. He married Lisa Greata Niska on 13 August 1858, in Hammerfest, Hammerfest, Finnmark, Norway. They were the parents of at least 6 sons and 2 daughters. He died in 1884, in Hammerfest, Hammerfest, Finnmark, Norway, at the age of 49.
Probably habitational name from a place called Käselow in Mecklenburg, Germany. The surname appears also as Germanized form Käselau.
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