I recognize this family because my tree connects to John Partridge and Hannah Seabury as ancestors, but I've not paid attention to John's second wife.
This looks like one of those all-too-numerous cases where profiles and family trees were created by copying from someone else's family tree (yes, we've all done that) -- and not only haven't they been verified, but content from different trees has been blended, so we end up with Mary Cullis baptized 4 Jan 1664, Broseley, Shropshire, Eng but born about 1661 in Massachusetts Colony (information I copied from Mary's profile). It seems to me that it's going to be necessary to individually compile the available details (births, marriages, deaths, etc. -- and use Findagrave only for the gravestone inscription) for each of these people, based on records and well-respected sources (no Ancestry trees, pedigree resource files, etc.), to see what we really know.
Don't even think about merges or renames until the data are compiled and examined.