Version Y = Yellow Book of Lecan (TCD, MS 1318 (H.2.16)), cols. 3–88.
| Ref | Text | § | Print ref | MS | |
|---|---|---|---|---|---|
| Y.1001 | Oen .i. un, ab eo quod est unus. | 1001 | col. 68 | concord. | |
| Y.1002 | Oenach .i. aine ech. | 1002 | col. 68 | concord. | |
| Y.1003 | Oeth .i. luidhe no eithech. | 1003 | col. 68 | concord. | |
| Y.1004 | Oar .i. guth. | 1004 | col. 68 | concord. | |
| Y.1005 | Oech no aoth .i. nama. | 1005 | col. 68 | concord. | |
| Y.1006 | Orb nomen uiri a quo Orbraige nominatur. | 1006 | col. 68 | concord. | |
| Y.1007 | Ogh quasi ob, i.e. ouum .i. ogh. | 1007 | col. 68 | concord. | |
| Y.1008 | Ord ab ordine. | 1008 | col. 68 | concord. | |
| Y.1009 | Olchobar .i. acobur lais ol. | 1009 | col. 68 | concord. | |
| Y.1010 | Orn .i. orgon. | 1010 | col. 68 | concord. |