I don`t know any
Viviana (I´m from Germany), but I think it`s an okay name, but I would prefer
Vivian.
Pet names could be: Vivi, Viana,
Vinnie,..
Viviana EstelleViviana LouiseViviana Milou
Viviana Yeliz
Viviana PaulineViviana GraceViviana EliseViviana JulieViviana CalistaViviana Eve