True, but when their removal from the Royal House was announced by the Royal Court, the Marshal of the Realm also announced that their partners and children would not share their titles.
Kungens beslut - Prinsbarnen kommer inte längre tillhöra kungahuset
Prins Alexander, prins Gabriel, prinsessan Leonore, prins Nicolas och prinsessan Adrienne är fortsatt medlemmar av Den kungliga familjen, och kommer även fortsatt att bära de titlar de tilldelats av kungen.
Deras titlar kommer dock inte att föras vidare till deras framtida partners och barn.
Naturally, the intention is not legally binding, but the Marshal also confirmed that the change had been discussed within the family, so Crown Princess Victoria was most likely in agreement. But it is possible that the issue may be viewed differently in 20-30 years when the grandchildren are born.
Well, it would be less strange for a child of a duke/duchess to likewise be a duke/duchess than for the child to have a ducal title but not the parent.