Have you found John Dunbar on any censuses before 1911 Ireland?
Do you have his 1904 Scottish marriage certificate?
Given that one of
John & Isabella's children was named
Ann Ferguson Dunbar
a bit of a long shot but I'm wondering if there
might be a connection with the name Ferguson for John's family
Jessie Dunbar Baptism 18 Jul 1880 West Calder, Midlothian, Scotland
Father
John Dunbar Mother
Ann FergusonAnn Baptism 09 Jul 1882 West Calder, Midlothian, Scotland
Father
John Dunbar Mother
Annie FergusonJane Baptism 07 Aug 1885 West Calder, Midlothian, Scotland
Father
John Dunbar Mother
Annie FergusonI couldn't find a baptism for John with above parents names but this looks to be the Dunbar family on
1881 & 1891 census and
they have a son named JOHN born c18781881 Civil parish: West Calder
County: Midlothian
Address: Saw Mill
John Dunbar 27 Meigle Perth, occ Mole catcher
Ann Dunbar 33 Kettins Forfar
JOHN Dunbar 3 Clunie, PerthIsabella Dunbar 4 Blairgowrie Perth
Jessie Dunbar 10 m Clunie Perth
Details of 1881 census from Scotland People
Perhaps this is John (Jnr’s) birth entry
DUNBAR JOHN
1878 339/ 2
Clunie (Perth)
And parents marriage entry
DUNBAR JOHN
FERGUSON ANNE
1876 335/ 4
Blairgowrie
1891 Town: West Calder, Edinburgh
County: Midlothian
Address: Torphin Mill
JOHN Dunbar 36 Meigle, occ
Estate labourerAnn Dunbar 42 Wife
Isabella Dunbar 14 Daughter
JOHN Dunbar 13 Son Blairgowrie, Perthshire, occ Quarry Labourer
Jessie Dunbar 10 Daughter
Ann Dunbar 8 Daughter
James Dunbar 5 Daughter (perhaps James should read Jane)
Jemima 03 Jun 1891 Birth West Calder, Midlothian, Scotland
Father:
John Dunbar Mother:
Annie Ferguson