Another group consists of those who were granted the title of Duke after they were allowed to make a new family with their special achievement taken into account, although their head families already had the title.
次に本家がすでに公爵となっているにもかかわらず、その人物の特別な功績が認められて別に家を立てることをゆるされ、さらに公爵位を授けられたグループがある。