Słownik angielskiego

Though the full dates of his reign are unknown, it is known that he reigned around the year 550.

The dates of his reign are unknown, but he was probably in power at the turn of the 12th century.

The exact dates of each king's reign are not known.

The precise dates of his reign cannot be known.

The dates of his reign are unclear, but he may have ruled from 512 to 534 or from 516 to 540.

The actual dates of his reign can only be roughly estimated.

The dates of his reign are disputed: either 865-877 or 864-872.

The dates and events of his reign are unknown.

The exact dates of his reign are disputed by scholars at various times ranging from 1462 to 1465.

There is no agreement on the date of his reign.