It is a help when tracing your family history to know something about the origin of and evolution of Irish names and particularly how names have changed over the centuries.
Repayment mortgage. With repayment mortgages you pay the interest and part of the capital off every month. At the end of the term, typically 25 years, you should manage to have paid it all off and own your home.
Getting a new mortgage to replace the original is called refinancing. Refinancing is done to allow a borrower to obtain a better interest term and rate. The first loan is paid off, allowing the second loan to be created, instead of simply making a new mortgage and throwing out the original mortgage.