Edward m. Old English ēad 'riches, wealth' + Old English weard 'guard, ward'.
The name of eight medieval kings of England, one of whom was the patron saint of the kingdom until 1348, as well as another 10th C saint.
Unlike many Old English names which never made it outside of England, and perhaps Scotland, Edward is one of the few which can be found as far away as Iberia in the Middle Ages.