Origin of o-s
- English O, o is attested in William Tyndale's 1525 New Testament Translation, as a translation of Ancient Greek ὦ, Latin o. (Compare the Old English particles èalà, æàlà, ǽlà, hèlà.) In Middle English, O is found in Acts 13:10, Romans 9:20 and Galatians 3:1, and ò is found in Romans 2:1,3, of John Wycliff's Newe Testament (1382). Compare la (a particle for introducing a statement or expressing surprise), from Old English; compare also English lo, oh.
- Compare the Old Saxon gloss o (950s) of the Lambeth MS (957) of the Gallican Psalter and the ó, o (post-1000) of the Durham Hymns, regularly seen in the redundant forms "o eala þu" and "ó eala þu" by proper names.
- Compare also the Anglo-Norman O (about 1200) of the manuscripts of Saints Juliana and Katherine, and other religious writs.