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Hamburg Passenger Lists, 1850-1934
5 million Russians, Germans, Jewish and Austrians 80% destined for USA, Canada

Search Emigration Records
over 50 passenger list
& immigration databases
totalling more than 15 million names

Dutch Immigrants
to America, 1820-1880
over 56,000 Dutch immigrants on more than 100,000 passenger lists

US Federal Censuses 1790-1930
search the only complete
US census collection on the web;
over 550 million names

Censuses

An Index to the Finnish-Canadians of the 1901 Census of Ontario, Districts of Thunder Bay, Rainy River and Kenora
Censuses of the United States containing Finnish-Americans
Swede-Finns in Cook County, Minnesota Taken from 1920 census

Military

Finland; WWII Casualties
War victims in Finland, 1914-22 information about  database is here

Passenger Lists

Insitute of Migration search ships passenger lists
Scandinavian Immigrants in New York, 1630-74