Here is some information about Michael KEON who arrived per Ocean Empress in 1864.
Keon Michael
Aged 23.
Born Donegal, Ireland.
A stone mason.
Roman Catholic.
Could read and Write.
Parents, Hugh and Bridget KEON of Donegal.
Relative in the colony, Peter KEON.
Sue
ADDING, I am not able to see anything further about the Michael KEON to Victoria.
Manifest only shows -
Michael KEON. Steerage passenger, aged 17.
This man was unassisted, so must have somehow gathered the means to pay.