1. Λεοντόκαρδος (Leontokardos): This is the most literal translation, combining the words for "lion" (λέων - leon) and "heart" (καρδία - kardia). It's a relatively uncommon word but conveys the direct meaning of "lionhearted."
2. Θαρραλέος (Tharraleos): This word means "bold," "courageous," or "brave." It captures the essence of lionheartedness without directly mentioning the lion.
3. Ανδρεία (Andria): This word signifies "manliness," "courage," and "bravery." It emphasizes the heroic and noble qualities associated with a lionhearted person.
4. Ευψυχία (Eupsychia): This word denotes "high spirit," "courage," and "noble-mindedness." It highlights the mental fortitude and unwavering spirit of a lionhearted individual.
The best Greek word to use depends on the specific context and the nuances you want to express.