O'Callaghan & Otway are just two of the twenty families that featured in the original book The Tipperary Gentry published in 2003 and now out of print. In this series 10 books will be published in total making all the data relating to the 20 families available. The material for all the books was gleaned from all available printed sources and in many cases from family members living in 2003. Most of the images are originals.