Wikipedia has this:

The Pattersons were an Irish folk band from County Donegal during the 1960s and 1970s. Originally consisting of Billy, Ronnie, Christine and Dorothy, they became a trio in 1964 when Dorothy left. The group released 5 LPs and achieved international recognition in the 70s, but are today best remembered for their frequent appearances on the Morecambe & Wise show, totalling 13 in all.

Christine Patterson married Dr. Michael O'Dowd (Retired Gynacologist and Pediatrician, Portiuncla Hospital) in the mid 70's and they have four children, Katie, Clare, Michael and David. They lived in Ballinasloe, County Galway for a number of years, but now reside in the beautiful picturesque village of Barna, County Galway.