991
| Ngwagakete: | Ngwagakete 1 |
|---|---|
| Mengwagakgolo: | Ngwagakgolo 9 – Ngwagakgolo 10 – Ngwagakgolo 11 |
| Mengwagasome: | 960s 970s 980s – 990s – 1000s 1010s 1020s |
| Mengwaga: | 988 989 990 – 991 – 992 993 994 |
991 (CMXCI) ebile ngwaga wa go thoma ka Mokibelo, ngwaga wa bobedi ngwagengsome wa 990s, ngwaga wa bomasomesenyane tee ngwagengkgolo wa Ngwagakgolo 10, le ngwaga wa bomakgolo senyane masomesenyane tee ngwagengkete wa Ngwagakete 1.