Trusty (?) wikipedia says the etymology of the term Geordie is uncertain, but probably coming from the name George - either from the most common name of the local pitmen, or the name of the lamps they wore designed by George Stephenson, or who knows!
I knew my gg grandfather was born in Newcastle upon Tyne, so always assumed he was a Geordie (and thought of him with the accent) but was disappointed when I started family history myself to learn his family were just staying there for a time - they were from Staffordshire, and moved around a fair bit, so I'm sure now he wasn't a Geordie.
