Hi All, I was reading about Philip 'the Good' of Burgundy (1369-1467) and I was wondering how and when would a ruler/noble/ royalty at that time receive such a nickname. As I understand, Philip received that name of 'the good' because of his devotion to the church (including donations and vowing to finance another crusade) and the creation of prestigious order of the Golden Fleece, but I can't find any answers on how or when in his life people decided to refer to him as 'the good.'

Were these nicknames picked postmortem? Or did nobles claimed these kind of titles during their reign to solidify their reputation? Or did they receive it during their life from their court/ clergy/ other institution?

And a kind of follow-up questions: where there any 'rules' or strict traditions in the late-medieval period when it came down to noble nicknames? And if so, who enforced these rules?

Thanks in advance!