Both signs continue the same Northwest Semitic consonant inherited from a shared abjad ancestor; this is a cognate correspondence, not a borrowing in either direction. Ugaritic and Hebrew share the same twenty-two-consonant core, with Ugaritic adding six further signs Hebrew never developed separately.
Source The World's Writing SystemsPeter T. Daniels and William Bright (eds.)
Celestial Ayin is a cipher glyph standing for the Hebrew letter Ayin; Agrippa's Book III prints Celestial, Malachim and Passing the River as tables of Hebrew equivalents, letter for letter.
Source Three Books of Occult PhilosophyHeinrich Cornelius Agrippa
Malachim Ayin is a cipher glyph standing for the Hebrew letter Ayin; Agrippa's Book III prints Celestial, Malachim and Passing the River as tables of Hebrew equivalents, letter for letter.
Source Three Books of Occult PhilosophyHeinrich Cornelius Agrippa
Passing the River Ayin is a cipher glyph standing for the Hebrew letter Ayin; Agrippa's Book III prints Celestial, Malachim and Passing the River as tables of Hebrew equivalents, letter for letter.
Source Three Books of Occult PhilosophyHeinrich Cornelius Agrippa
Ayn and the Hebrew ayin continue the Semitic pharyngeal and carry the same inherited name. Both languages also merged into it a second consonant, the voiced velar fricative that Arabic still writes as ghayn.
Source Comparative Dictionary of Ge'ez (Classical Ethiopic)Wolf Leslau
Cognate letters. Arabic ayn and Hebrew ayin both continue the twenty-two letter Northwest Semitic alphabet, and they hold the same place in the inherited order and the same numeral value, 70. Neither is derived from the other.
Source The World's Writing SystemsPeter T. Daniels and William Bright (eds.)
Syriac E and Hebrew Ayin stand at the same place in the twenty-two letter Aramaic sequence and carry the same letter-numeral value, 70. The Syriac script grew out of the local Aramaic cursive of Edessa and the Hebrew square script out of the same Aramaic alphabet, so the two letters are inherited from one ancestor rather than borrowed from each other.
Source The World's Writing SystemsPeter T. Daniels and William Bright (eds.)
Mandaic In and Hebrew Ayin occupy the same place in the twenty-two letter Aramaic sequence. Hebrew keeps the inherited noun as the letter name and the numeral value 70; Mandaic keeps neither. Where the Mandaic shapes came from is disputed, a cursive Aramaic hand or the Parthian chancery script.
Source The World's Writing SystemsPeter T. Daniels and William Bright (eds.)
Samaritan In and Hebrew Ayin are cognates, both continuing the same Paleo-Hebrew sign at the value 70. The Samaritan name records the weakening of the fourth and last of the throat consonants in the community reading tradition.
Source The World's Writing SystemsPeter T. Daniels and William Bright (eds.)
Greek Omicron and Hebrew Ayin are cognates. Both continue the same Phoenician sign, which is why both carry the numeral value 70 in their letter-number systems. A shared ancestor, not a borrowing in either direction. The Greek alphabet was adapted from the Phoenician abjad in the early first millennium BC, and the Hebrew square script descends from the same abjad through Aramaic.
Source The World's Writing SystemsPeter T. Daniels and William Bright (eds.)
Hebrew Ayin and Greek Omicron continue the same Phoenician ayin; both carry the numeral value 70 in their letter-number systems.
Source The World's Writing SystemsPeter T. Daniels and William Bright (eds.)