| Answer | Crossword Clue |
|---|---|
| OTHO | 10th cen. Holy Roman Emperor. |
| OTTOI | 10th-cen. Holy Roman Emperor known as "the Great" |
| OTTOI | 10th-century Holy Roman emperor |
| OTTOII | 10th-century Holy Roman emperor |
| OTTOI | 10th century Holy Roman emperor |
| OTTO | ... the Great (10th-century Holy Roman emperor) |
