Eusebius is the Latinized form of Eusebios, a Greek name derived from the adjective εὐσεβής (eusebes), meaning "pious". This itself comprises the elements eu ("good") and sebo ("to worship, to honour"), giving the sense of "good worship" or "piety". The name is most famously borne by Eusebius of Caesarea (c. AD 260/265 – 30 May AD 339), also known as Eusebius Pamphilius, a pivotal figure in early Christian history. He is regarded as the Father of Church History for his seminal work Ecclesiastical History, which chronicles the Christian church from the Apostles to his own time. A bishop of Caesarea Maritima, Eusebius was a prolific writer and scholar who produced a commentary on the biblical canon, a geographical lexicon of the Holy Land (Onomasticon), and a biography of Constantine the Great. His works provide critical insights into the early church and are foundational for the study of Christian origins. The name was held by several saints and through its religious significance spread through Christendom, appearing in various forms across languages: Eusebio (Spanish, Italian), Eusébio (Portuguese), Eusebiu (Romanian), among others. Today it remains in occasional use, typically within Roman Catholic or Orthodox communities that honor its saintly bearer. Key Facts Meaning: "pious" Origin: Greek; via Latin Type: first name, male Usage regions: historically Europe, especially Roman Empire