The first was an unknown sailor buried on 5 February 1940.
The young man whom Thomas Thompson mistook for his son remains unidentified to this day; he rests with four other unknown sailors in Goderich, Ontario.
Maria Concepcion's father seems likely to have been an unknown European sailor who also had Huntington's disease.
As of 2009, attempts to compare the DNA with relatives of Sydney personnel had yet to identify the unknown sailor.
It took all the remains of his self-control to keep from grabbing the unknown sailor next to him and squeezing until the man's eyeballs popped out.
The unknown sailor was buried in Thursley churchyard and the gravestone was paid for by the residents of the village.
Thomas Cunningham, a telegrapher named Stanley Craig and two unknown sailors.
This was 18 years before the murder of the unknown sailor on Gibbet Hill so this event was clearly not the origin of the name.
The monument is a figure of an unknown sailor, in whose hands rests an axe as a sign of boarding.
During the battle off Cape Bougaroun, one unknown sailor aboard the Beatty dropped over the side a message in a bottle.