I have not been able to find a link between my Scarf family and those on the Isle of Man.
I have discovered that the Isle of Man has its own family history group at
http://www.isle-of-man.com/interests/genealogy/fhs/I have got as far as Edward Scarf born in High Ercall, Shropshire in 1806/1807 who moved from this rural area to the newly industrialised West Midlands where he married Mary Turton in 1825 and had a son, Caleb Scarf born in 1828. Thanks to Ancestry.com I am now in contact with other descendants of Caleb in the USA and in Australia.