Comments by "rivenoak" (@rivenoak) on "Queen Elizabeth II's Children-in-Law" video.

Viscount Severn was not granted to James, it is his courtesy title. as soon Edward becomes Duke of Edinburgh, James becomes Earl of Wessex and Forfar by same courtesy tradition
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@thekingsdaughter4233 not if Edward is Duke. by then the Earl is courtesy title for James
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@andypham1636 yes, the titles stay with him but the heir gets one fur funsies. we know "Viscount Severn" is a lesser title to "Earl of Wessex and Forfar" thus we know James is Edward's heir. if you would meet "Viscount Hinchingbrooke" you would be at loss perhaps to know the connection: that's the heir to "Earl of Sandwich". but some like Viscount of Megiddo or Viscount of Alamein are standalone titles in their own right. just by title alone you never know if it's a subsidiary title or head of the house.
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@stevedunwoody880 Earl of Merioneth is not on the table afaik; Edward is Earl twice already. Baron Greenwich (the lowest title Phiilip held) will likely remain in the desk too.
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