Meanings of sibling's great-grandson in English

Louis is a great-grandnephew of Washington Irving.

Several years ago, a centenary conference took place at the author's old haunting ground, with speakers including his great-grandnephew, Dacre Stoker.

Now his great, great, great, great-grandnephew is continuing the tradition, although this time producing his own spirit and paying the excise duties.

He was the great-grandnephew of the infamous creature of reprobate Pope Sixtus IV.-CountGirolamo de' Riari-ofthe Pazzi Conspiracy a hundred years before.

'I hope we have seen the last of Shylock's great-grandnephew,' said I emphatically.