I don't have any information on John C. and Elizabeth Marshall, parents of Sarah (Marshall) Falconer. The family of Elizabeth (Newkirk) Falconer, daughter of Abraham and Keziah (Shipman) Newkirk, appears in _The Nieuwkirk, Nieukirk, Newkirk Family_, Publications of the Genealogical Society of Pennsylvania (Philadelphia, 1934).
The family of Gilbert Molleson, father of Margaret (Molleson) Falconar, appears in two articles I co-wrote with Donald Whyte, "Early Mollisons in Aberdeen," _Aberdeen & North East Scotland Family History Society Journal_, vol. 32 (Autumn 1989): 3-9, and vol. 34 (Spring 1990): 2-11.
For Ogilvy and Carnegie, see Sir James Balfour Paul, _The Scots Peerage_ (Edinburgh: David Douglas, 1908), in 9 volumes. This also has most of the other noble lines too.