See [Syß].

On, and, [519].

Possibly a mistake.

One, on, often used for In; One to = unto.

Onan,
Onone,
Onon,

anon, [158], [1466], [2602], etc.

The form “onan,” [l. 3086], suggests the derivation of anon; viz. from A.S. on-án, in one; hence, forthwith, immediately.

Onys, once, at some time or other, [3013];

at onys, at once, [3187].

Opin, [1286],
Opine, [13],