Arthur O’Neill. Arrived on the Macedon in 1849

[L44]

Hi,I’ve just resumed my search about my great great great grandfather Arthur O’Neill-as you know family search takes you off into many tangents.
I’ve been finding info about the Chn who were listed as coming over in 1849
James born 1828
Nicholas born 1830
Margaret born 1832
Honora born 1835
Arthur born 1837

On two different sites I’ve seen listed 2 other siblings
Thomas born 1815 who married Jane Graffon
(this birth date seems off compared to the others)
and
Patrick born 1833 who married Anastasia Critchley

I also can’t find when they migrated to Australia