French Saint Martin and it is also spelled this way in Spanish, Italian and English. Saint Martin was named for St. Martin of tours on whose feast day was November 11, 1493. Columbus first saw these white sandy shores. When Columbus first sailed Arawak or Carib Indians populated those, St. Martin's. The Arawaks were subjected by Warlike Carib Indians from South America a short time before the arrival of the Spanish.
The double identity of the island causes confusion about the correct spelling of the name. The Dutch side as part of the Netherlands is correctly spelled "Sint Martin." Even public institutions can't agree about how to spell Saint Martin or Sint Martin.
It is not off the north east England coast. It is near Barrow in Furness, Cumbria which is Northern West England coast.