642
| Ngwagakete: | Ngwagakete 1 |
|---|---|
| Mengwagakgolo: | Ngwagakgolo 6 – Ngwagakgolo 7 – Ngwagakgolo 8 |
| Mengwagasome: | 610s 620s 630s – 640s – 650s 660s 670s |
| Mengwaga: | 639 640 641 – 642 – 643 644 645 |
642 (DCXLII) ebile ngwaga wa go thoma ka Mokibelo, ngwaga wa boraro ngwagengsome wa 640s, ngwaga wa bomasomenne pedi ngwagengkgolo wa Ngwagakgolo 7, le ngwaga wa bomakgolo tshela masomenne pedi ngwagengkete wa Ngwagakete 1.