On RootsIreland I see the following transcripts for what appear to be twins, but with different Christian names for the same mother? Parish of Bekan, Co. Mayo.
Richard, bapt. 15/7/1836, son of Michael Waldron and Ellen Cribben
Catherine, bapt. 16/7/1836, dau of Michael Waldron and Mary Cribben.
Apparently Bekan is one of those parishes with multiple entry locations for given dates, so I can't personally verify the above. I can imagine Cribben being distorted in the Antipodes.