From The Collaborative International Dictionary of English v.0.48 :
Dhony \Dho"ny\, n.
A Ceylonese boat. See Doni.
[1913 Webster] Dhourra
Dhoorra
From The Collaborative International Dictionary of English v.0.48 :
Doni \Do"ni\, n. [Tamil t?n[imac].] (Naut.)
A clumsy craft, having one mast with a long sail, used for
trading purposes on the coasts of Coromandel and Ceylon.
[Written also dhony, doney, and done.] --Balfour.
[1913 Webster]