History:
The spread of this surname probably shows how people with this surname moved around historically. Wars, famines, or better job opportunities might have pushed families to different places. Where people settled depended on things like available land and existing towns. The spelling of this surname might have changed over time because of how names were written down or simply because people changed how they said it.
Description:
I need more information to answer your question.
However, I can guess at some possibilities based on how surnames often change. We might see simpler spellings like Sanirapu, or slightly altered versions like Sanivarapoo. To know for certain, youd need to check official family records.
