skos:altLabel | - father
- king
- his son
- Piedmont
- the Crown Prince
- Italian Royal Family
- Humbert II
- Crown Prince Umberto
- Crown Prince Umberto of Italy
- Crown Prince of Italy
- H.R.H. Crown Prince Umberto
- HM King Umberto II
- HRH The Prince of Piedmont
- Italy's Crown Prince
- King Humbert II
- King Umberto
- King Umberto II
- King Umberto II of Italy
- Lieutenant of the Realm
- Prince Umberto
- Prince Umberto II
- Prince Umberto II of Savoy
- Prince Umberto of Italy
- Prince Umberto of Savoy, Prince of Piedmont
- Prince Umberto, Prince of Piedmont
- Prince of Piedmont
- Umberto
- Umberto II
- Umberto II di Savoia
- Umberto II of Savoy
- Umberto III, Count of Savoy
- Umberto Nicola Tommaso Giovanni Maria
- Umberto di Savoia
- Umberto of Italy
- Umberto of Savoy
- Umberto of Savoy, Prince of Piedmont
- Umberto, Prince of Piedmont
- Umberto_II_of_Italy
- prince Umberto
- prince of Piedmont
- the crown prince
- Prince '''Umberto''' Nicola Tommaso Giovanni Maria of Savoy, Prince of Piedmont
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