| Answer | Crossword Clue |
|---|---|
| OTHO | Roman emperor of the 10th century. |
| OTTO | ... the Great (10th-century Holy Roman emperor) |
| OTTOI | 10th century Roman emperor |
| OTTOI | 10th-century Roman emperor |
| OTTOI | 10th century Holy Roman emperor |
| OTTOII | 10th-century Holy Roman emperor |
| OTTOI | 10th-century Holy Roman emperor |
| OTTOI | 10th century emperor dubbed "the Great" |
| OTTOI | 10th-century emperor known as "the Great" |
| OTTOI | 10th-cen. Holy Roman Emperor known as "the Great" |
| NERVA | Roman emperor of the 1st century. |
