The will of Dr. Gerardus Hillis Wynkoop, who died at his home, No. 14 Madison avenue, on May 15, was filed yesterday in the Surrogate's office for probate. Dr. Wynkoop, who was a prominent surgeon, left an estate of only $18,000.
    The last prominent case which the testator treated was that of Dr. William T. Bull, living only a short time after the death of his colleague.
    Dr. Wynkoop's will divides his estate equally between his two sons, Daniel Woodbury Wynkoop and Gerardus Hillis Wynkoop, and his two daughters, Ellzabeth Hillis Morris and Kate Childs Forwood. The latter lives at Holyoke, England.

Source:

Unknown, "Dr. Wynkoop's Children Get Estate," New-York Tribune, Sunday, 18 July, 1909, page 7.