Cyrillic script consonants from the older Glagolitic alphabet for sounds not found in Greek. Tradition holds that Cyrillic and Glagolitic were formalized either by Saints Cyril and Methodius who brought Christianity to the southern Slavs, or by their disciples. Paul Cubberley posits that although Cyril may have codified and expanded Glagolitic, it was his students in the First Bulgarian Empire under Tsar Simeon the Great that developed Cyrillic from the Greek letters in the 890s as a more suitable script for church books. Later Cyrillic spread among other Slavic peoples, as well as among non-Slavic Vlachs. Cyrillic and Glagolitic were used for
Paleo-Hebrew alphabet use the Paleo-Hebrew alphabet. During the 3rd century BCE, Jews began to use a stylized, "square" form of the Aramaic alphabet that was used by the Persian Empire (which in turn was adopted from the Assyrians), while the Samaritans continued to use a form of the Paleo-Hebrew script, called the Samaritan script. After the fall of the Persian Empire, Jews used both scripts before settling on the Assyrian form. For a limited time thereafter, the use of the Paleo-Hebrew script among Jews was retained only to write the Tetragrammaton. The independent Hebrew script evolved by developing numerous cursive features, the