Cyril (827 - 869 C.E., originally named Constantine) and Methodius (825 - 885 C.E.) were born into a noble family in Thessalonica, Greece.
Kyrillos (827 – 869, algse nimega Konstantinos) ja Methodios (825 – 885) olid pärit Kreekast Thessalonikest ühest aadliperest.