San Carlos
The sound was named by John Strong in 1690 for Viscount Falkland, the name only later being applied to the archipelago and its two largest islands. The Spanish name "Estrecho de San Carlos" refers to the ship "San Carlos" which visited in 1768; confusingly the English name "San Carlos Water" is a much smaller inlet on East Falkland - and gives its name to San Carlos, Port San Carlos and the San Carlos River.