Name Sidero Gender Feminine Usage Greek Mythology Scripts Σιδηρώ(Ancient Greek) Theme metal Edit Status Status3. usages AND description are verified Meaning & History Derived from Greek σίδηρος (sideros) meaning "iron". In Greek legend Sidero was the abusive stepmother of Tyro, finally murdered by Tyro's adult son Pelias atop an altar to the goddess Hera.