Cummins or Cummings and Hendry's in Donegal

Hi
My ancestors Darby (Jeremiah) Cummings (Cummins or Commons) and Bridget Hendry (Henry) were married in 1849 in Greenock, Scotland before moving to Govan where Darby worked in the shipyards. I know that Darby and Bridget came from Ireland.Darby's parents were Phelix and Alice.Bridget's parents were Patrick Hendry ( a farm labourer) and Jane (possible McLur). One family story is that they were from Bundoran but this may not be true. I know this is a long shot but if anyone recognises this couple's names and knows where they may have originated from, please let me know.Thanks.