The source for the American dead is the American Battle Monuments Commission. As their site states, they only list those actually buried or commemorated at the monuments they maintain,

Of the 405,399 Americans that lost their lives during World War II, there were 78,976 Missing in Action. Of the remainder the next of kin of 93,242 elected to have their loved ones buried at our cemeteries. Below is a listing by cemetery showing the number buried and the number that were declared Missing in Action in the vicinity of the cemetery. The listing of the World War II database, now on the web contains the 172,218 names of those buried at our cemeteries, those Missing in Action and those buried or lost at sea. It does not contain the names of the 233,181 Americans returned to the United States for burial.

There is a source here for all the Americans killed in WW2, but that comes in 100 scanned volumes organised by name within count within state and that would take forever to search. One day it will be searchable online, and then I can complete this section.
 

American Blackburns killed in World War Two - source
 

British and Commonwealth Blackburns killed in World War Two - source

There are nearly 500 Blackburns listed amongst the 1.7 million names in the Commonwealth Graves Commission Debt of Honour database, Link here. This remarkable resource gives details of the circumstances of death and the locations of the graves for each one.

Blackburn Memorials pages split 14th September 2002.