Gustavia may refer to. Gustavia, Saint Barthélemy, the largest town on (and capital of) the Caribbean island of St. Barthélemy. Gustavia, Rügen, an unfinished town project in Swedish Pomerania. Gustavia (plant), a genus of plants in the family Lecythidaceae. Gustavia (arachnid), a genus of arachnids in the family Gustaviidae. People with the name include: Gustavia Lui, New Zealand businesswoman https://en.wikipedia.org/wiki/Gustavia