421
| Ngwagakete: | Ngwagakete 1 |
|---|---|
| Mengwagakgolo: | Ngwagakgolo 4 – Ngwagakgolo 5 – Ngwagakgolo 6 |
| Mengwagasome: | 390s 400s 410s – 420s – 430s 440s 450s |
| Mengwaga: | 418 419 420 – 421 – 422 423 424 |
421 (CDXXI) ebile ngwaga wa go thoma ka Labohlano, ngwaga wa bobedi ngwagengsome wa 420s, ngwaga wa bomasomepedi tee ngwagengkgolo wa Ngwagakgolo 5, le ngwaga wa bomakgolo nne masomepedi tee ngwagengkete wa Ngwagakete 1.