William O'Brien, the second Earl of Inchiquin is an interesting person. When you consider what Wikidata knew about him, much of it is missing. No members of the Irish Privy council were known, and he was not noted as being a governor of Jamaica. It is not known that a ransom was paid by the English parliament to the Turks.
When you read the Wikipedia article, It is mentioned in one sentence that he was the first governor of Jamaica but that is all there is. There is not much more except that he died in Jamaica in 1692 and that he was Vice-Admiral of the Caribbean Seas.
When you consider the bias in all this, it is found in the lack of attention for countries like Jamaica. Their history is in the people who were responsible for what is their country. When you read about the family of the earl, you may note that he married women of substance and obviously they are notable enough for inclusion in Wikidata. What is not known is if his wife accompanied him to Jamaica..
Much of the source material on the history of countries like Jamaica can be found in British archives and museums. Improving on the articles on people like Mr O'Brien and sharing this information widely will make Wikipedia more useful outside of its immediate and current interest.