What is a question about this article? If the question is unanswerable, say "unanswerable".

Captain John Charles Marshall and Thomas Gilbert visited the islands in 1788. The islands were named for Marshall on Western charts, although the natives have historically named their home "jolet jen Anij" (Gifts from God). Around 1820, Russian explorer Adam Johann von Krusenstern and the French explorer Louis Isidore Duperrey named the islands after John Marshall, and drew maps of the islands. The designation was repeated later on British maps.[citation needed] In 1824 the crew of the American whaler Globe mutinied and some of the crew put ashore on Mulgrave Island. One year later, the American schooner Dolphin arrived and picked up two boys, the last survivors of a massacre by the natives due to their brutal treatment of the women.:2

Which French citizen was involved in naming the Marshall Islands?
Louis Isidore Duperrey