sentences:  For the masculine name, the variant "Vyvyan" has sometimes been used, based on the Cornish surname itself derived from the given name.The intermediary form "Vyvian" is also occasionally found.The Gaelic name Ninian has sometimes been identified as a corruption of "Vivian", but it is now considered more likely derived from Welsh "Nynniaw", which is itself of uncertain origin, but likely renders "Nennius".