I'm a linguist. And while in the shower given the news of the queens passing. It occurred to me that all of the traditional names of English Royalty are via French. Henry, Richard, George, etc are all Germanic in origin, but filtered through Old French and Norman French before arriving on the English throne... For obvious reasons.
None of them are native English names: Except one. "Edward". None of the Old English names seemed to have survived the Norman conquest except Edward and occasionally a prince being named Edmund.
The last Anglo-Saxon King was Edward the Confessor. Then the Norman Edward Long shanks took the Throne and named on his son's Edward and Edmund
Why did the Norman nobility take a big enough liking to the "Ed" names for Edward to be the only Native English traditional Monarch name; while the others got supplanted by French or biblical names
This has a relatively straightforward answer, in that the English name Edward didn't survive the Conquest: it was consciously revived to honour a pre-Norman English saint.
Edward the Confessor is the English king whose death in 1066 precipitated that year's succession crisis and invasions. King Edward was later venerated for his religious piety (especially by clerics at the abbeys and churches he'd founded, such as Westminster Abbey) and in 1160 a papal decree declared him a saint.
Henry III was also a notably pious king, and he was particularly devoted to the cult of St Edward. He came to the throne in 1216, at the age of 9, and he inherited a realm that was in open rebellion against his father. Henry may have looked to St Edward as an example of a unifying king in a time of external and internal threats; after the serious blows to royal authority during John's reign, it may also have been attractive for Henry to draw on a sense of continuity with an older, Anglo-Saxon monarchical example in addition to his own Plantagenet forebears.
During his reign, Henry rebuilt Edward's Westminster Abbey as a royal church and he installed a grand tomb for St Edward the Confessor as its centrepiece. (Later English and British monarchs would be crowned in the Abbey and until the 1700s most of them were buried there; today it still hosts royal weddings and state funerals.) It was specifically in honour of St Edward the Confessor that Henry III gave his firstborn son the English name of Edward, rather than a French/Norman name like the rest of the family.
When Edward came to name his own sons, three were named for distinguished family members (Henry, John, Alphonsus) and three bore the names of English saints: another Edward, a Thomas for Thomas Becket, and an Edmund for King Edmund the Martyr.
Edit: Dates and punctuation fixed
There is always much more to be said about this - it's actually a pretty complex topic. But here are some previous answers to similar questions:
and Why has there never been an Alfred II? by myself