Hi, these must be brothers to Christopher
Owen died in 1867
Use this site(it's free)
In 1901 Rhall in Longford
This family of Rhall moved to Dublin this is in 1911
Only these two show in the Census.
I checked Church rescords for births and the only list from c 1829.
This is Patrick's daughter on her second marriage
Not many Rhall names after the above records.