Richards of Wexford help please

Hi, my extended family are having a family get together next month, we have collectivly been collaborating on researching our grandfather's line. So far we have our g g grandfather Thomas Richards born Wexford about 1832 and arriving in Australia in 1853 age 21and married Mary Anne Walsh, his father is where we are stuck, we know his father is John Richards who married Eliza Rossiter. We can't get any further. We know that there are 3 independent lines of Richards in Wexford, it would be ideal to know which line we are descended from. Any information would be helpful.:o

Richards of Wexford help please