"Fred Jordan was both, those songs he learned from his family....."
Sorry again Cap'n
If a traditional singer who also learned songs from the revival, learned blues from a record, music hall songs from Harry Champion records, and Beatles songs from...... would that make him/her a traditional/revival/blues/music hall/pop singer?
The term 'traditional' refers to his/her position in relation to the singing tradition, everything else is extra.
As Hilary pointed out, no singer, or very few, confined their singing to one type of song.
Jim Carroll