Columbus O'Donnell Iselin (September 26, 1851 – November 11, 1933) was an American financier and philanthropist who was prominent in New York Society during the Gilded Age.
[23] In Switzerland, the Iselin family had been merchants, public officials, and military and professional men since the 14th century.
[2] His mother was related to John Carroll, the first Roman Catholic bishop in the United States and the founder of Georgetown University.
[24] With his family, he owned a significant portion of the Rochester and Pittsburgh Coal and Iron Company,[a] of which he began serving as president in 1885 and later as the secretary-treasurer.
[24][33] His father had purchased extensive property along Davenport Neck, the Long Island Sound shore community in New Rochelle where he built a country estate for himself, All View, and for Columbus and his siblings.