Hello Sally,
William Gibson Bannatyne is a 2nd cousin once removed of mine.
My grandmother Mary Gibson, from Yarrawonga, Victoria, stayed with his grandmother, Mary Gibson Bannatyne in Dunedin, NZ, in 1907, when she came to NZ to be married. Mary Gibson Bannatyne was my grandmother's aunt.
Mary Gibson married William Bannatyne in 1858 in Launceston, Tasmania. Later they moved to Dunedin.
Hope you can follow all that.
Regards
Jean
I am now off to Trove to see what I can find about William G Bannatyne