My Great-Great Grandfather was Daniel McCorriston (brother of Hugh and Catherine) from County Derry, Ireland. He and Hugh left Ireland in 1862 (Dan was 22) and arrived in Hawaii in 1865. They eventually settled on the Island of Molokai. Daniel married Ann (1849-1907) and they had seven children (as far as I know): Margaret Ann (Meyer), Edward, Elizabeth (Foster), Aileen (Ah Hong Ah Ping), Hugh,Samuel, and my Great Grandmother, Sarah (Dunn).
I'm not sure who the other Daniel McCorriston mentioned(the nephew)is--there must be another brother--he would not have been mentioned in "my" Daniel's obituary if he was deceased. Maybe John or Edward because Daniel named his sons those names.
Let me know if you would like to get into this further. I no longer live in Hawaii, but I go often because my mother (Sarah's granddaughter) lives there. I have been to the Molokai graveyard, and my husband and I are going again in July.