I have added your surnames of interest to your subject heading. The Caribbean is a huge place. In order to help you at all, we will need more information, such as: some years of interest, some first names, some sorts of relationships between your GRANTs and your STUARTs, ANY idea of origin (other than probably an English-speaking area), immigration to U.S. or ?? Start with yourself and work your way backwards, so you can tell us how you connect to the Caribbean.

Alva