"the descendent" is a correct and usable phrase in written English.
You can use it to refer to someone who is descended from a particular ancestor, as in the following sentence: "John Adams was a descendent of the Mayflower Pilgrims."
Go itself is the descendent of Infoseek, one of the pioneering search engines that indexed millions of Web pages.
Mr. Pennacchi, the descendent of one such family, won several awards for his depiction of his hometown and its history.
Calpurnia is in the fictional tradition of the "happy black", the contented slave – the descendent of the ever-loyal Mammy in Gone With the Wind.
We found it in a 30-foot, 3-axle Airstream travel trailer, the descendent of those capsule-shaped aluminum campers made famous in the 1950's.
The logic is truly opaque; obviously the descendent of a baronet couldn't complain about his own poverty, whatever his circumstances, because of his breeding.
It's promiscuous with slang – Cher Lloyd's talk of swagger being jaggered is the descendent of 60s producers calling tracks Captain Groovy and His Bubblegum Army.
(It allowed me, for example — the descendent of Eastern European Jews and Chinese immigrants — to plausibly dress like an Englishman on the moors).
Augusto Senior, the descendent of Breton cheese-makers who settled in Chile in the early 18th century to escape the Wars of the Spanish Succession, wanted his son to be a doctor.
Verizon, which has its headquarters in New York, is the descendent of New Jersey Bell and several other regional operators spun off from AT&T in the original 1984 divestiture.
This is seriously minimal stuff, the descendent of Brian Eno's ambient projects, and is enough of an acquired taste to ensure that it will never be besmirched by commercial appropriation.
