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Michael Brodie and Agnes Cuthbertson were married in Campbeltown in 1872. Their marriage certificate will tell you the names of their parents including their mothers' maiden surnames.
In the index to the 1911 census, Michael Brodie, 59 and Andrew Brodie, 16, are listed in Campbeltown.
In the 1871 census Michell Brodie, 18, fisherman, is with his widowed mother Margaret, who was born in Ireland.
The death of Agnes Cuthbertson or Brodie, aged 47, was registered in Campbeltown in 1901, not 1902.
In the 1861 census Agnes Cuthbertson, 6, is with her parents Andrew Cuthbertson, mother Mary and three siblings. Andrew C and Mary Morins were married in Campbeltown in 1849. In the birth records of her children her surname is indexed as Morens, Marans, Moulin (twice), Morrins and Morrens.
Mary Morrans or Cuthbertson died in Campbeltown in 1902. Andrew Cuthbertson died in Campbeltown in 1909. Their death certificates will tell you the names of their parents including their mothers' maiden surnames.