Noun
The grandson of one's brother or sister.
Source: Webster's dictionaryHis grandiose tomb in St. Peter's was commissioned by his grandnephew, Cardinal Pietro Ottoboni, and designed by Count Arrigo di San Martino. Source: Internet
Website run by Hurt's grandnephew Fred Bolden, with forums and discussions open to the public. Source: Internet
His Son and Grandnephew Might Lose the Race to Replace Him. Source: Internet