Harcourt Cosman was the son of David H. Cosman b. 1847)and Delia A. Harcourt (b. 1852).They are shown in the 1900 federal census living in Newburgh, where David is listed as a fruit farmer.Harcourt's older sister is Lena (b. 1879).
The listing errs in showing a "Jeanie Cosman" as a daughter of David and Delia.The actual Jennie Cosman was the daughter of a different David Cosman and his second wife, Nellie J. Curtis Taber Cosman, who lived in Hilton, Parma, NY.Jenny married Myron L. Northrup in abt. 1905. This David is my step-great grandfather, but I do not know how/if he is connected to the other Cosmans, some of whom moved to Hilton in the late nineteenth century.