Ancestry trees show her father's other wife
as this Martha's mother.
I was reading the notes in her father's profile and it states:
" His wife is listed as Abigail Cook, b. 1630 in Montgomery, Wales and d. sans date in Salem, Essex, Massachusetts. By date that connects her to Bartholomew; by location she ends up in Massachusetts. But their supposed child, Martha Elizabeth (who married Henry Freeman--my ancestors), was born in 1642 in James City, Virginia--when Abigail Cook was 12 years old (unless the birth date is incorrect) and in Virginia, not unheard of but an unlikely migration."
GIven that, her mother actually being Dorcas Isham who was born in 1616 would make a lot more sense.
Good find, Abigail Cook makes no sense as Martha’s mother. Probably a mixup with Stephen Hopkins of the Mayflower.