I'll tell you how I'm leaning.
I believe Oguina (and her sister), niece of Massasoit, existed and married Europeans and probably had surviving children.
I'm not seeing her husband as Gabriel Whelden of Yarmouth & Malden though. He is decently documented, and seems to have been entirely in England until 1638. His children were born & baptized in Basford, Nottinghamshire, between 1612-1630 (records on all of them). He did it seem have a last daughter Sarah born 1650 in Massachusetts.
His wife was Jane in 1637, and she signed property deeds with him. There is no record of her in America or any note in contemporary records that Gabriel had a wife in America until he married Margaret, his surviving widow, and definitely a step mother. Apparently Gabriel left his (substantial) property to her, the kids protested, she was summoned to court, and then no further record of her in MA.
Margaret, wife of Gabriel Whelden, signed a letter protesting the ejection of Mr. Marmaduke Matthews as "elder" of the Yarmouth Church, providing literacy. Manasseh Matthews, probably Marmaduke's son, was a witness to Gabriel's will. The Matthews family all left MA & returned to Wales in 1655; presumably his sister Margaret & her daughter Sarah Whelden with them.
So the time line for Oguina to be the mother of Gabriel's children if:
- she was born much earlier than 1608, more like 1595, as the children were born starting 1612
- she somehow got to a blacksmith's shop in land locked Nottinghamshire before 1612
- she died before 1637, when Gabriel is documented with a wife Jane
====
Based on the timeline & baptismal records, I have moved the children over to Jane (unknown).
Please register any objections, with citations, in this discussion.