This name derives from the Latin “sĕrēnus”, the title given to the Emperor, especially superlative, meaning “the sky, clear, cloudless, (figuratively) peaceful, tranquil, calm, quiet, sunny. The Holy Serena Rome was an early Christian martyr in the 3rd Century. Her feast day is celebrated on August 16. Serena was a noblewoman of the late Western Roman Empire. In 384, Theodosius arranged her marriage to a rising military officer, Stilicho. Stilicho's marriage to Serena ensured his loyalty to the House of Theodosius in the years ahead. Saint Serenus the Gardener (Serenus of Billom) was a 4th-century martyr venerated by the Roman Catholic and Eastern Orthodox churches.