Complex sentence: As the pronunciation varied across indigenous groups, many of the alternative names, as mentioned in the OED, included furacan, furican, haurachan, herycano, hurachano, hurricano, and so on.
Split into simpler sentences: As the pronunciation varied across indigenous groups, there were many alternative names along the way. The OED mentions furacan, furican, haurachan, herycano, hurachano, hurricano, and so on.