According to Ptolemy, there were two other tribes known as the Cornovii, one in the Midlands and another in the far North. It is on this basis that the name of this putative ancestor-tribe of Cornwall is inferred. Although the Brittonic name is clearly derived from the word "*cornu-", which means "horn", opinions diverge over whether or not this refers to the shape of the land. Considering that Cornwall is at the end of a long tapering peninsula, many scholars have adopted this derivation for the south-western Cornovii. For instance, Graham Webster in "The Cornovii" (1991), which is primarily about the Midlands tribe, states that the horn derivation could apply as long as the geography was apparent, as it might have been to Roman surveyors in the first century, and Victor Watts in the "Cambridge Dictionary of English Place-names" (2010) interprets the name "*Cornowii", a different spelling for latinised Cornovii, as "the people of the horn".