Nowadays of course there is intermarrying and travelling, and frequent streams of new blood coming in-half the people you speak to are not Cornish at all-but still there is something remaining which stamps them as a whole.
"Cornwall"
G. E. Mitton
Whatever may be the obscurity, however, in which their rise is buried, it is certain that the Bassarab family gave many princes and rulers to Wallachia, and, after intermarrying with other members of the ruling classes, only became extinct about the year 1685. In the mountains the state of affairs was somewhat different.
"Roumania Past and Present"
James Samuelson
Often the last heir of some respectable name dies in England, and we say that the family is extinct; whereas, very possibly, it may be abundantly flourishing in the New World, revived by the rich infusion of new blood in a new soil, instead of growing feebler, heavier, stupider, each year by sticking to an old soil, intermarrying over and over again with the same respectable families, till it has made common stock of all their vices, weaknesses, madnesses.
"Septimius Felton or, The Elixir of Life"
Nathaniel Hawthorne