Hi I found some information that may be of interest to you. My name is Amos and I am a Shirreff living in Brisbane Australia. I have never known much about my family history. I have always been told there is a Jamaican connection and I think I may have found it. John shirreff is mentioned to have moved from Glasgow to Jamaica this is mentioned in
the hidden life, a memoir of mrs shirreff (Mary)
http://books.google.com.au/books?id=g0kBAAAAQAAJ&printsec=frontcover&dq=shirreff+jamaica&source=bl&ots=4-FZhi76vt&sig=S-EGWJN0ZPm8S2VDX2sbLlcIbAM&hl=en&ei=PYz3TI7MDoqycYCF8KAH&sa=X&oi=book_result&ct=result&resnum=8&ved=0CDEQ6AEwBw#v=onepage&q=jamaica&f=false.
Clifford Shirreff was reportedly born jamaica 1830
to father Clifford shirreff Sr and mother Mary Anne Burnett.
http://records.ancestry.com/Default.aspx?pid=155238202&gss=seoMany of the shirreff's were either born in or died in Stawell in Victoria there is infact a street named Shirreff st in Stawell. I am some what intrigued now and want to continue this research.