Just encountered you mesage board enquiry. I hope this channel is still open.
It is likely that your Diana Osborn Parkinson was part of a Welsh family by the name of Williams with origins in Pembrokeshire, Wales, and a long history in Liverpool, England. If so, her maiden name was Diana Williams, and her parents were James Williams and Elizabeth Williams, and her siblings were John Williams, Joshua Williams, Leslie Williams, and Caroline Williams.
John Willliams was my Great, Great Grandfather.
I would appreiate an opportunity to compare notes with you. I would very much like to know when Diana Williams Osborn Parkinson came from England and why she chose Wyoming as her home.