Martha Elizabeth Wynne (Buttall) - Correct name

I am looking for documentation supporting the use of the middle name Elizabeth for this person. In many lines I have reviewed she is listed alternately as Martha or Elizabeth Wynne, nee Buttall. So far my research has shown that there were 2 Buttall sisters, married sequentially to Dr. Wynn. The first, Martha, died in Wales. Dr. Wynne than married her sister Elizabeth. After the death of Elizabeth, Dr. Wynne then married Elizabeth Maude, which also seems to complicate some of the constructs.

So my question is, should the person on this page be listed only as Martha Wynne ?