He was born in Finland, and both his parents were from Finland.
According to his FamilySearch profile, created by Ericcjohnson, he was born 7 February 1889 in Oulu, Finland.
He married Anna Ryytt in 1907 in Worcester, Massachusetts.
According to Wikipedia, Yrjö is the Finnish equivalent of George.
↑ "Massachusetts Marriages, 1841-1915," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:2:9JH2-SHZ : 10 March 2021), Entry for Yrjo Kansanniva and Anna Ryytt, 20 Apr 1907; citing Worcester, Massachusetts, United States, State Archives, Boston; FHL microfilm 2,315,300.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:2:9MFS-Y2CX : 10 January 2021), Household of George A Kansonniva, Maynard, Middlesex, Massachusetts, United States; citing enumeration district (ED) 9-292, sheet 3B, line 57, family 73, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 1610.