There were things his grandchildren, in turn, should know. Yet he hesitated. How do you tell your children they are progenies of the self-proclaimed inventor of Manhattan clam chowder? (The New York Times) Oxford Dictionaries say "progeny" is a noun treated as singular or plural, but on Internet I found a number of occurrences of "progenies" and, hence, a doubt arose to my mind: is it entirely wrong pluralize "progeny"? Answer I agree that your citation sounds strange; at least, it does to my ear. Reading that I almost wonder whether the author hasn’t somehow conflated progeny and prodigy , since the latter’s plural form is unremarkable. However, digging deeper, one finds that the OED entry for progeny , last updated in 2007, makes no mention one way or the other. It gives as its sense 1a 1a . Offspring, issue, children; descendants. Occas .: a child, a descendant; a family. a definition that is already in the plural, but which admits a singular sense “...