We have added two new country codes to our database : Saint Martin and Saint Barthélemy both of which are French overseas collectivities in the Caribbean and have previously been part of the French overseas department Guadeloupe. In 2007 they seceded from Guadeloupe and have received the ISO country codes MF and BL (ISO Newsletter PDF).
Saint Martin : MF, MAF, 663 (FIPS : RN)
Saint Barthélemy : BL, BLM, 652 (FIPS : TB)
Saint Barthélemy is named after Christopher Colombus’s brother Bartolomeo. It was a Swedish possession before being sold to France and it’s capital Gustavia bears the name of King Gustav III of Sweden. The Arrawak Indians called the island “Ouanalao“.
The island Saint Martin is separated into a northern part Saint Martin, a French overseas collectivity, and a southern part Sint Maarten which is part of the Netherlands Antilles.
GeoNames Blog 
[…] The island of Saint Martin is divided into the French northern part (MF) and the Dutch southern part (SX). The French northern part seceded from Guadeloupe in 2007. […]