How did the game of Dominoes come to be so named?

Dominoes are descendants of dice. The two ends on each of the original Chinese dominoes represented one of the 21 combinations that can occur with the throw of two dice. Modern western dominoes, however, have blank ends on them as well and so the number of dominoes is generally 28. Dominoes were apparently unknown in Europe until the 18th century and may have been invented in their modern form in the Dominican Republic. The dark spots on light faces apparently reminded people of masquerade masks with eyeholes (called dominoes) and thus gave the playing pieces their name. Chinese dominoes do not have blanks, but some whole tiles are duplicated.

https://en.wikipedia.org/wiki/Dominoes#History

Dominoes are descendants of dice. The two ends on each of the original Chinese dominoes represented one of the 21 combinations that can occur with the throw of two dice. Modern western dominoes, however, have blank ends on them as well and so the number of dominoes is generally 28. Dominoes were apparently unknown in Europe until the 18th century and may have been invented in their modern form in Dominican Republic. THE DARK SPOTS ON LIGHT FACES APPARENTLY REMINDED PEOPLE OF MASQUERADE MASKS WITH EYEHOLES (CALLED DOMINOES) AND THUS GAVE THE PLAYING PIECES THEIR NAME. Chinese dominoes do not have blanks, but some whole tiles are duplicated.

http://www.boredgourd.com/activity/30/dominoes.html

Dominoes are descendants of dice. The two ends on each of the original Chinese dominoes represented one of the 21 combinations that can occur with the throw of two dice. Modern western dominoes, however, have blank ends on them as well and so the number of dominoes is generally 28. Dominoes were apparently unknown in Europe until the 18th century and may have been invented in their modern form in the Dominican Republic. The dark spots on light faces apparently reminded people of masquerade masks with eyeholes (called dominoes) and thus gave the playing pieces their name. Chinese dominoes do not have blanks, but some whole tiles are duplicated
https://en.wikipedia.org/wiki/Dominos#History

Just to be non-Gimboid, according to http://www.gamecabinet.com/rules/DominoIntro.html

'Domino' is the French word for a Christian priest's winter hood which was black on the outside and white on the inside

Merci a Dieu, SOTHC.

I might mention that term "Domino," is used both for the traditional black cloak and also for the half-mask of the Venetian Carnevale. The cloak term seems to be derived from the monastic original, later extended to the masks (though merely as one term among several):

http://www.umich.edu/~ece/student_projects/masquerade/commonalities.html