Robert Shafer is a linguist known for his work on the Proto-Indo-European language and Indo-European studies. He is the author of numerous articles and books focusing on historical linguistics and phonology, particularly in relation to Indo-European languages.

I'm not sure what you mean by "Caribbean." The main languages spoken in tghe Carribean Sea are Spanish (as in Cuba), English (as in Jamaica), and French (as in Haiti). You have already spelled "Monday" in English. The Spanish and French are "lunes" and "lundi."

There is also a Carib (or Cariban) language, spoken by some people on islands of the Caribbean Sea and in the northern part of South America. Whatever the seven days of the week are called in that language were probably adopted from one of the European languages such as Spanish.

Anthony Layng has written:

'The Carib Reserve' -- subject(s): Carib Indians, Carib Reserve (Dominica), Cariban Indians

Hilary Frederick has written:

'The Caribs and their colonizers' -- subject(s): Cariban Indians, History, Indians of the West Indies, Land tenure

Kalinagos spoke a language called 'Cariban'. When the Europeans arrived, they bagan calling the Kalinagos by the name "Carib". They also conveyed the Caribs as warlike and cannibals, which was not the truth. The europeans did that in order to justify the unjust slaughter of the natives of the islands.