Question: What symbol was used by early Christians to identify themselves in times of persecution? In Greek, this symbol is a monogram for the first five letters of the words "Jesus Christ Son of God, Savior".
Answer: The Greek word for fish is ICHTHUS. It is the symbol used by early Christians to identify themselves in times of persecution. In Greek, ICHTHUS (ΙΧΘΥΣ) is also a monogram for the first five letters of the words “Jesus Christ Son of God, Savior.”