do any of the residents of the island know of the name Brahmin or have had any dealings with this man?

Do you mean surname Ibrahim?

His full name abraham Azafrani Rubio, eill be in his late 40s now, used to deal in property and was also a qualified helicopter pilot or so he said. Any info would be most helpful!

No sorry, the latest Brahim mentioned around here recently was the one sent to Tahiche prison for trafficking illegal immigrants - this was a J Brahim and he's 32.

He would not be difficult to trace, it´s a small island. Just a google of his name reveals lots of references including:
http://autonomos.axesor.es/informe-de-a ... io/5120042