Another belief is that the name is derived from the Sinhala name "Kola-amba-thota" which means 'Harbour with leafy/green mango trees'. This coincides with Robert Knox's history of the island while he was a prisoner in Kandy. He writes that "On the West, the City of Columbo, so-called from a Tree the Natives call Ambo, (which bears the Mango-fruit) growing in that place; but this never bare fruit, but only leaves, which in their Language is Cola and thence they called the Tree Colambo: which the Christians in honour of Columbus turned to Columbo."