the Royal House
王族の.
皇室.
the imperial family [household]
His Imperial Highness the Crown Prince.
His Majesty the King
to uphold the Throne―rally round the Throne
the Crown Prince
王室の先祖の
the British royal court
the wife of the Crown Prince
the prerogatives of the crown
the rank of Crown Prince
the Imperial estate
the ceremonial chair of a king