| Answer | Crossword Clue |
|---|---|
| KRUGER | Otto the actor |
| HOLYROMANEMPIRE | Otto the Great's domain |
| HRE | Otto the Great's realm: Abbr. |
| HRE | Otto the Great's domain: Abbr. |
| HRE | Realm of Otto the Gt. |
| HAHN | Otto who split the uranium atom |
| INTRUDER | Evil Otto, in the video game Berzerk |
| FRISCH | Otto who worked on the Manhattan Project |
| CMLI | Year Otto I became king of the Lombards |
