skos:altLabel | - The Prince
- Ferdinand
- Ferdinand I
- Prince Ferdinand
- King Ferdinand
- Tsar's
- '''Ferdinand I'''
- King Ferdinand I
- Bulgarian Tsar Ferdinand I
- Ferdinand I Saxe-Coburg-Gotha
- Ferdinand I, King of Bulgaria
- Ferdinand I, Prince of Bulgaria
- Ferdinand I, Tsar of Bulgaria
- Ferdinand Maximilian Karl Leopold Maria
- Ferdinand Saxe-Coburg and Gotha
- Ferdinand Saxe-Coburg-Gotha
- Ferdinand of Bulgaria
- Ferdinand of Saxe-Coburg
- Ferdinand of Saxe-Coburg and Gotha
- Ferdinand of Saxe-Coburg-Gotha
- Ferdinand of Saxe–Coburg and Gotha
- Ferdinand I of Bulgaria
- His Majesty Ferdinand I of Bulgaria
- King Ferdinand I of Bulgaria
- King Ferdinand of Bulgaria
- King Ferdinand's
- Prince Ferdinand I
- Prince Ferdinand Maximilian
- Prince Ferdinand Saxe-Coburg-Gotha
- Prince Ferdinand of Bulgaria
- Prince Ferdinand of Saxe-Coburg and Gotha
- Prince Ferdinand of Saxe-Coburg-Gotha
- Prince de Bulgarie
- Princess Alžbeta
- The Bulgarian Czar
- The Czar
- The Tsar of the Bulgarians
- Tsar Ferdinand
- Tsar Ferdinand I
- Tsar Ferdinand I of Bulgaria
- Tsar Ferdinand of Bulgaria
- Tsar of Bulgaria
- Tzar Ferdinand
- knyaz Ferdinand I
- tsar Ferdinand
- Ferdinand, Prince of Bulgaria, Prince of Saxe-Coburg and Gotha
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