Onderdonk

Onderdonk is a surname. Notable people with the surname include:


 * Andrew Onderdonk (1848–1905), construction contractor
 * Benjamin Treadwell Onderdonk (1791–1861), bishop of the Episcopal Diocese of New York
 * Henry Ustick Onderdonk (1789–1858), second Episcopal bishop of Pennsylvania
 * Julian Onderdonk (1882–1922), American Impressionist painter
 * Robert Jenkins Onderdonk (1852–1917), American painter and art teacher
 * William H. Onderdonk (1820–1882), American lawyer