Answer:
HEXACORD
Apex
Guido of Arezzo
This painter is famous under the name of Fra Angelico. He died February 18, 1455, in Rome.
Hexachord
Guido of Arezzo
Guido Penelli's birth name is Guido Nicols Penelli.
Ariana Guido's birth name is Ariana Pearl Guido.
Guido Kaczka's birth name is Guido Martn Kaczka.
Guido Seeber's birth name is Friedrich Konrad Guido Seeber.
Guido Da Verona's birth name is Guido Verona.
Guido Merkens's birth name is Guido Albert Merkens Jr..
Francesco Maurizio Guido's birth name is Francesco Maurizio Guido.
Guido de Moor's birth name is Guido Anthony Christiaan de Moor.