I posted a reply last night which has not updated for some reason. This is no simple question that you ask and I need time to consider.
At present in the middle of a First World War history.
I will return to your matter in time and I have been thinking about it.
Can I ask a few questions first so that I know how to frame my reply?
1/ Are you a usa national?
2/ Is you interest a matter of private study or academic?
Also, I read Atherton & Atherton 1505/06 about 5 years ago and whilst I may have the original transcription, I wrote it up in modern english. I was preparing the documentation for a History of The Athertons of Bickerstaffe which documents are in our archive . However, whilst the "fragments" that you have posted are contemporary, I have never seen them in this format and I wonder what the source can be? This particular case has been published by The Record Society for Lancashire and Cheshire but as a single verbatim manuscript.
One thing I will say now is that the Atherton Family were never noble or aristocratic but rather they were large scale farmers. Some also worked as soldiers either permanent or part time in the Medieval.Younger sons inherited little and became plain ordinary and very humble people.Over time some became poor. The main branch of the family, father to eldest son and so on had a level of income that obligated them to deal with some local government issues until the early modern/modern period, but they were all " Common Men"