427: Bliain
| Blianta: 424 425 426 - 427 () - 428 429 430 | |
| Deicheanna blianta: 390í 400í 410í - 420í - 430í 440í 450í | |
| Céadta blianta: 4ú céad - 5ú céad - 6ú céad | |
Eachtraí
Breitheanna
Básanna
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