https://www.wikitree.com/g2g/930406/adopted-profile-that-1500s-certified-1700-they-need-merged
We need sources to prove that her maiden was indeed "De Strandon". I am going to postpone the merge until someone gets some sources up there
One of the profiles is now sourced, albeit weakly, based on same sources as husband. The surname should be Standon, not Strandon per sources. I suggest merge continue. See: https://www.wikitree.com/wiki/Help:Merging
The source for all of this is this book
https://books.google.com/books?id=o6lLAAAAMAAJ
But the use of "de" was obsolete by that date (some families re-adopted it later as an affectation). I think that's a good indication that this isn't a recorded name - she's Joan Unknown, and somebody made something up to fill the gap.