Ignatius I Mattingly was born about 1704 in Leonardtown, St. Mary's County, Maryland. He died about 1789 in St. Mary's County, Maryland. He has reference number 13059. Parents: Thomas II Mattingly and Elizabeth Unknown.
Children were: Leonard Mattingly , William B. Mattingly, Luke Mattingly, Elizabeth Mattingly, Sarah Nancy Mattingly, Susanna Mattingly, Ignatius II Mattingly.
Leonard is given as his first child, and was born in 1739, 5 years after Walter was born.