Marion Boyd - MARION BOYD

Can anone identify the parents of Marion Boyd, the putative mother of James Hamilton of Finnart?

The Scots Peerage says this about her putative son, James Hamilton of Finnart: "He is said to have been the son of a lady named Boyd". https://archive.org/stream/scotspeeragefoun04pauluoft#page/361/mode... Memorie of the Somervills goes further: "James Hamilton naturall sone to James, the second Lord Hamilton, and first Earle of Arrane, begotten on a daughter of the Lord Boydes," although which Lord Boyd is being referred to is not clear. https://archive.org/stream/memorieofsomerv11815some#page/315/mode/1up The Oxford Dictionary of National Biography identifies the mother of James Hamilton of Finnart as Marion Boyd of Bonshaw but upon what authority is not clear. http://www.oxforddnb.com/view/10.1093/ref:odnb/9780198614128.001.00...