Argh! Just got the internet back after a few days. This is the info that I have from the census, cemetary, etc. I still need to read the Manitowoc board reply...I was investigating the Arnoal=Arendal connection too, so i am glad that someone else thought of that too.

ZORN'S RURAL ROUTES DIRECTORY
1905 MANITOWOC COUNTY
Swensen Omen,* Valders R 1
Swensen Alfred, Valders R 1
Swensen Elmer, Valders R 1
Swensen Etta, Valders R 1
Swensen Nels, Valders R 1
Swensen Olin, Valders R 1
Swensen Oscar, Valders R 1 <-my great-grandpa

1860 Manitowoc census, Eaton township
page line dwelling family Persons living in family on the 1st day of June 1860 age sex occupation r.e. value pers.prop. birthplace
162 1 1266 1155 Ole Swenson 65 M Farmer 600 300 Norway
162 2 1266 1155 Betsey Swenson 62 F -- -- -- Norway
162 3 1266 1155 Peter Swenson 22 M Farm Laborer -- -- Norway
162 4 1266 1155 Catherine Swenson 18 F -- -- -- Norway
162 5 1266 1155 Owen Swenson 15 M -- -- -- Norway

WEST VALDERS CEMETERY
Liberty Township, Manitowoc Co., Wisconsin
SWENSEN: Emma/1893-1955, ossw: Elmer/1885-1952
Ole/Died Sept. 27, 1866/Age 70 yrs., ossw: His wife/Berthe/Died June 8, 1877, Age 80 yrs.
Omen/Born Aug. 28, 1845/in Arnoal Norway, Died Mar. 24, 1914, ossw: Inger M./Mar. 17, 1854/Jan. 7, 1927