ملف:Arms of the Royal Family of Bulgaria 1909.svg

Arms: Bulgaria with escutcheon: ¼: 1. Bulgaria with escutcheon Saxony; 2. Azure, three fleurs de lys Or and a label of three Argent (Orleans); 3. Azure, three fleurs de lys Or and a bordure Gules (Bourbon); Azure, a lion Or swinging a sword Argent standing on a base of three hills Argent (Csabrag); and in nomril point Saxony. (note:the label of Orleans is missing)

On the escutcheon are the arms of Ferdinand himself, his mother's father Louis Philippe d’ Orleans, King of the French, his mother's mother Mary Amalia of Bourbon, Princess of the Two Sicilies, his father's mother Princess Antonia Kohary of Csabrag, and of his father's father Ferdinand, Prince of Saxony-Coburg and Gotha.