I love love love the name [name]Vivien[/name], and its a family tradition (five generations running!) that the first born girl always has her first middle name be [name]Ann[/name] (we also have a tradition of double middle names).
Is [name]Vivien[/name] [name]Ann[/name] too many -an/en sounds?
Hmmm now that you mention it… I think it’s pretty anyway 
What if you had a second name in there? Names that flow well with ann often don’t end in an “a” and are common enough to flow well.
[name]Vivien[/name] [name]Mary[/name] [name]Anne[/name]
[name]Vivien[/name] [name]Catherine[/name] [name]Ann[/name]
[name]Vivien[/name] [name]Rose[/name] [name]Ann[/name]
I love [name]Vivien[/name] (with this spelling only). It’s lovely.
I like the sound of [name]Vivien[/name] [name]Ann[/name], it’s repetitive but I like that. The only thing which I don’t like is when it’s written down my eyes are confused - like, I almost want to say [name]Vivianne[/name]/[name]Vivian[/name]. But maybe that’s the way I process spellings haha.
Maybe [name]Vivienne[/name] to get that different sound in before [name]Ann[/name]? And I too think a third name for rythym could be fun. [name]Vivienne[/name] [name]Patsy[/name] [name]Ann[/name]?