Mildred was linked to the noble Neville family through her supposed parents John Weston and Cecily (Neville) Weston, sister of the 4th Earl of Westmorland. Both John and Cecily existence is suspect because of a pedigree fabricated in 1632 for Richard, Lord Weston, then Lord Treasurer of England who was elevated to the peerage as 1st Earl of Portland..
I removed her parents since there was no citations and I can't easily find any source that has her parents. I was curious if any one has some information about her ancestry?
Next, her husband John White needs some citations, I specifically had trouble finding evidence of their marriage.
I did want to point out that the John Weston above lived in Litchfield, Staffordhsire and John White lived in Timsbury, Hampshire which are pretty far from each other in 16th century terms so its more likely if Mildred was a Weston her family was from Hampshire. Weston is a common UK last name. Thanks!