Cyrillic script of Bulgaria to the European Union on 1 January 2007, Cyrillic became the third official script of the European Union, following Latin and Greek. Cyrillic is derived from the Greek uncial script, augmented by letters from the older Glagolitic alphabet, including some ligatures. These additional letters were used for Old Church Slavonic sounds not found in Greek. The script is named in honor of the two Byzantine brothers, Saints Cyril and Methodius, who created the Glagolitic alphabet earlier on. Modern scholars believe that Cyrillic was developed and formalized by early disciples of Cyril and Methodius. In the early 18th century,
Glagolitic script the same model as "alpha" + "beta". The Slavs of Great Moravia (present-day Slovakia and Moravia), Hungary, Slovenia and Slavonia were called "Slověne" at that time, which gives rise to the name Slovenish for the alphabet. Some other, rarer, names for this alphabet are Bukvitsa (from common Slavic word "bukva" meaning "letter", and a suffix "-itsa") and Illyrian. In the Middle Ages, Glagolitsa was also known as "St. Jerome's script" due to popular mediaeval legend (created by Croatian scribes in the 13th century) ascribing its invention to St. Jerome (342–429). That claim, however, has been resolutely disproven. The epoch of