Erik, Here is a possibility for Martin in Seattle, King county, Washington in 1900, line 12. He was born in Jan 1877 in Pennsylvania and both parents were born in Norway. https://familysearch.org/pal:/MM9.3.1/TH-266-13031-74861-72?cc=1325221 There was a Martin B Olson in the Canadian census in 1901, but familysearch does not have the image and the index doesn't give others in the household. Name: Martin B Olson Event Type: Census Event Date: 31 Mar 1901 Event Place: F, Unorganized Territories/territoires Non-organisés, The Territories, Canada Gender: Male Marital Status: Single Nationality: Us Relationship to Head of Household: Brother Birthplace: Pa Birth Year (Estimated): 1877 Page: 15 Citing this Record "Canada Census, 1901," index, FamilySearch (https://familysearch.org/ark:/61903/1:1:KHRP-HZ3 : accessed 21 April 2015), Martin B Olson, F, Unorganized Territories/territoires Non-organisés, The Territories, Canada; citing p. 15, Library and Archives of Canada, Ottawa.