Unfortunately, your tree has a lot of the same names but when checking on the dates doesn't quite fit. My Great Great Grandfather, Peter Tormey was born in 1814. I am not sure where in Ireland but later raised his family in Dublin. He had an older brother Joseph, who left first for America around the time of the Potato famine. Peter Tormey also had a son Peter, My Great Grandfather, born in Dublin in 1853. I believe they had family in Longford or Granard but I have not been able to establish that yet. Many of the other same names in my Great Grandfather's family: Michael, Edward, Peter, John, Patrick, Francis, Theresa, Catherine, etc.
I am not seeing an Owen Tormey in our line.
I will keep looking and keep you posted.
All the Best,