Who is the youngest guitarist?
I'm not sure I understand your question, but as far as rock guitarists go professionally I think in the 80's Rowan Robertson of Dio was one of the youngest guitarists in professional rock (17 years old when he joined Dio.) -- Youngest confirmed to really play guitar is Frano Zivkovic, at his 3,5 years.
The youngest performer at Woodstock 1969 was Michael Shrieve. Michael was the drummer for Santana. He was born July 6th 1949, making him 20 years old at the Festival. Several other performers were 20 that year too, but Mr Shrieve was the youngest. Henry Gross the guitarist of Sha Na Na was born April 1st 1951, which makes him 18 years old at Woodstock is the youngest.
Its kind of hard to answer depending on what you are looking for - are you basing it on degree of success or just the fact that someone was good at the guitar at a young age? Basing it on success and notoriety, Johnny Lang was 13 when he released his first album. George Harrison was only 14 or 15 when he was asked to join a band that would become the Beatles. The youngest…
If your talking about the family of the Jonas Brothers.... Oldest to Youngest- 1. Paul Kevin Jonas SR- dad 2. Denise Jonas- mom 3. Paul Kevin Jonas JR (Kevin)- Guitarist 4. Joesph Adam Jonas (Joe)- Singer 5. Nicholas Jerry Jonas (Nick)- Singer/ Guitarist/ Drummer/ Pianist 6. Franklin Nathaniel Jonas (Frankie)- "Bonus Jonas" he isn't in the band though.