sentences:  It is ultimately related to the adjective "vivus" "alive", but it is formed from the compound form "vivi-" and the adjectival suffix used to form "cognomina".The latinate given name "Vivianus " was of limited popularity in the medieval period in reference to Saint Vivianus, a 5th-century bishop of Saintes; the feminine name was that of Saint Viviana (Bibiana), a 4th-century martyr whose veneration in Rome is ascertained for the 5th century.In Arthurian legend, "Vivian" in its various spellings is one of the names of the Lady of the Lake.