Swan was born about 1843. He passed away about 1908.
Sources
Find a Grave, database and images (https://www.findagrave.com/memorial/63391965/sven-johnson: accessed 19 June 2023), memorial page for Sven “Swan” Jonasson Johnson (10 Mar 1843–8 Apr 1908), Find a Grave Memorial ID 63391965, citing Lakeview Cemetery, Ludington, Mason County, Michigan, USA; Maintained by Kris (contributor 47404669).
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DNA Connections
It may be possible to confirm family relationships with Swan by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Swan: