Hello Friends: Looking for info on John & Margaret O'Holloran.(My gr-gr grandparents.)John's approx birth was 1816. Came to U.S from Ireland.Margaret's maiden name would be very helpful.John & Margaret's son (also John) was born in Ohio. I do not know what Port they entered the U.S. from. John (son) married Sarah O'Connor in Stratford,Perth,Ontario on 2/4/1875.