Interpretatio germanica

Interpretatio germanica is the identification of Roman gods with Germanic deities. It is reflected in Germanic weekday names that correspond to Roman gods, such as Tuesday and Wednesday.

Interpretatio romana: The practice of interpreting foreign deities as counterparts of Roman gods. It is the broader Roman practice that interpretatio germanica applies to Germanic deities.
Tyr: A Germanic god associated with war, law, and heroic courage. His name replaced Roman Mars in the Germanic name for Tuesday.
Tacitus: A Roman historian whose works include an ethnographic account of Germanic peoples. His descriptions identify Germanic gods through Roman divine names.
Latin weekday names: The Latin names for the seven days of the week, several named for Roman gods. They preserve the Roman names that Germanic weekday names adapted.
Interpretatio graeca: The practice of identifying foreign gods with gods of ancient Greece. It offers a parallel model for translating one pantheon into another.
Mars (mythology): The Roman god of war and a guardian of the Roman state. He was the Roman counterpart associated with Tyr in weekday naming.
Germania (Tacitus): Tacitus's work describing the lands, customs, and peoples of Germania. It records Roman interpretations of Germanic religious figures.
Planetary week: A seven-day week whose days are associated with the seven classical planets and their gods. It supplied the sequence in which Roman and Germanic divine names were matched.
Germanic mythology: The myths and religious traditions associated with ancient Germanic-speaking peoples. Its deities supplied the counterparts used in these identifications.
Odin: A Germanic god associated with wisdom, poetry, magic, and war. His name replaced Roman Mercury in the Germanic name for Wednesday.

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