The Duke's exit from the last vestiges of monarchical duties has not only reshaped his future - it's creating waves through his family too.
The former spouse has now surrendered her ducal status and will now be referred to as Sarah Ferguson.
For Ferguson, sixty-six, the transition will be the most visible.
Throughout this period, she has maintained the honorary royal post-marital designation Sarah, York Duchess. Currently, she returns to her birth name of Ferguson.
"She will have lost a certain prestige over this," said one monarchy expert. "She certainly does use the title – including her Twitter bio is @TheDuchessSarah."
But the relinquishment of her status may impact her much less than the controversy she's dealing with independently about her own connections to Jeffrey Epstein.
Last month, multiple organizations removed her as ambassador after correspondence from 2011 showed that she called Epstein her "supreme friend" and seemed to apologise for her public criticism of him.
Away from her philanthropy, Ferguson also has various business ventures.
And these ventures, are more probable to be affected by the Epstein scandal than any change in title, notes one royal commentator.
But Ferguson has been a remarkable endure in royal circles. She's kept bouncing back.
"She is the supreme perseverer and expert at transforming," commented one royal author.
For the couple's offspring, Beatrice, 37, and Eugenie, 35, there's no formal change.
They will still be known as royal princesses, which they have been granted since their birth.
Additionally there is no change to the royal succession order.
The prince stays eighth position to the throne, succeeded by his daughters Beatrice and Eugenie, in ninth and twelfth place in that order.
But in reality their positions are "low down" and will likely become even more remote as time goes on.
The princesses are also presently non-official royals, and while they occasionally take on roles – Princess Eugenie was recently named as a mentor for the monarch's charity program – experts also suggest they "don't envision a scenario" in which they would step up into royal duties.
"Regarding Beatrice and Eugenie go, I think there's an appreciation of the fact that this controversy doesn't involve them, and it's unjust for it to affect them directly in the separate paths they are carving out for themselves," says one royal commentator.
"Their daughters are most unfortunate victims, they've had to endure quietly and have been composed in their reserve," states another royal author.
Ultimately, there appears to be minimal uncertainty that the person who will be most impacted by these developments will be the Duke himself.
For a man who consistently enjoyed the royal privileges, the pomp and the pageantry, the loss of his titles is deeply humiliating.
Therefore lacking those, on a individual basis, will significantly count.
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