Whilst researching my posts on the death of Piers Gaveston, I hadn't quite realised how often Piers was referred to as Edward II's 'brother'. The theory of a brotherhood pact between the two men was explored in depth in Pierre Chaplais' book Edward II's Adoptive Brother, published in 1994. I looked at his work in one of my very first posts on this blog, here . I can't believe that was written 6 years ago. I've read so much more since. Here are some examples of Chronicles and other sources in which the idea of a brotherhood between the two men existed.
According to one chronicle, Edward had used the term even as Prince of Wales. Throughout his reign he continued to use the term - and sometimes, even the word adopted was used. Here's a quote from early on in the Vita Secundi, when Piers returns from Ireland after exile. Edward greeted him at Chester and greeted him like a brother, -
'indeed he had always called him his brother’. This suggests Edward had been referring to Piers as brother for some time. Had he been doing this in his father's reign to the extent that his father became concerned and banished Piers for his first exile? The Vita also refers to Piers as -