Cyril (827 - 869 C.E., originally named Constantine) and Methodius (825 - 885 C.E.) were born into a noble family in Thessalonica, Greece.
Siril (827 - 869 M, yang nama aslinya adalah Konstantin) dan Metodius (825 - 885 M) terlahir dalam keluarga bangsawan di Tesalonika, Yunani.