There isn’t proof; looks like a bad call was made. I’ve disconnected.
Here’s a view of the Vivian pedigree
https://media.geni.com/p13/23/be/4d/9f/534448493c617975/f9156a8e-d6...
From The Visitations of the County of Cornwall, Vivian Pedigree, page 529
http://ukga.org/england/Cornwall/visitations/
I’m not happy with the Nicholas Phillips tree either, locations are all over the map, and no citations anywhere.