Hi Jill,
Had another little browse for John Kerr but I'm not having much luck.
I wonder if you could list the full names of all his children to see if that can give us a pointer to to family.
I had been considering the John Kerr born to John Kerr and Agnes Semple in Stewarton but his year of birth is 1835 making him a wee bit too young to be the groom in 1851 at Rhu. He is on the 1851 Census at St Mary's or Tron, Glasgow aged 16 living with an aunt and uncle Elizabeth and Hugh Snodgrass and working as a Flesher. I'm not convinced he's the man you're looking for?!
Looby
BTW- the above John Kerr is the same one firthview found in Reply no.1
I have to say the entry for your listings above don't really sound correct, just the names are not within my tree. Concurring middle names of children are: Murdock, Thompson, Kerr, Paterson.
John and Janes children are:
Archibald Kerr, b 1852, Scotland and died Scotland ( Assuming he died)
Archibald Kerr, b 1854, Glascow, Scotland
Margaret Murdock Kerr, b 1856, Aust
Agnes Thompson Kerr, b 1858, Aust ( Johns Mothers name was Agnes)
James Paterson Kerr, b 1860, Aust
John James Kerr, b1863, Aust
William John Kerr, b1865,Aust
Isabella Jane Kerr,1868,Aust
Grace Elizabeth Kerr,b1870,Aust
Andrew Allen Kerr,b 1873,Aust