Sorry took me a while to reply. My tree shows Martin Herward marrying Mary Beaty around 1830 in Ireland. I think their children were Ann, Mary, Patrick Catherine, Michael and John. I think our strand runs from John who married Ann Simcock. They seem to have Martin, John, Catherine, Mary, Ann, Margaret, Sarah and Winifred. From there, Martin was in Stoke, England where family has continued to live. He died in WW1.
This is info I have gathered from looking at this intermittently - mixed confidence in whether I have fitted it together right. I think family members left Ireland for USA or England At the time of the famine.