I just found this out:
My Grandfather's Uncle Floyd Ethridge: had a musical association with Dr. Aaron James' Great-Grandson, Arthur Leroy Smith.
(son of William Calvin Smith). They played locally in Humphreys/Dickson and nearby and also on the Grand Ole Opry(1920's)
Both carried the nickname of (Fiddlin') Research shows that both Smith and Ethridge were distantly related through Smith's (mother's line)
going way back to Roane Co. Tenn. {Common ancestral names Tummins/Heath}
Best Regards!
John