^The entail of Nicol Bontine of Ardoch disponing the estate to his cousin Robert Graham of Gartmore stated that the holder of Gartmore could not also hold Ardoch at the same time and required the holder of Ardoch to assume the name Bontine. This led to the eldest son assuming the name Bontine during his father's lifetime and reverting to Cunninghame Graham with the Bontine as an additional forename upon succeeding to Gartmore. Major Bontine, due to his illness, never reverted to Cunninghame Graham. The practice has become almost impossible in modern times though the current head of the Cunninghame Graham family, William Robert Bontine Cunninghame Graham of Gartmore assumed the Bontine into the middle of his name upon the death of his father in 1996.
^There is no hyphen between the two surnames (as is the Scottish fashion) which were first joined together by Don Roberto's great-great-grandfather, Robert Graham of Gartmore, in 1796 when he inherited the Cunninghame estate of Finlaystone in Renfrewshire from his cousin John, 15th and last Earl of Glencairn.
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