Looking for Information on Thomas and Alicia Cummins Dublin 1840 S

My GG Grandmother Mary Cummins married Robert Whelan at St Andrews Chuch Dublin in 1864 parents listed as Thomas and Alicia Cummins after any information on them and other children. Also Robert Whelan his parents list on registration as Pat and Catherine Whelan. Can anyone help. My GG Grandparents emergrated to Victoria Australia and then to New South Wales Can assist anyone looking for the same family