+--JOHN D FREDERICK 
+--HENRY B FREDERICK  (1849-1923)
|  +--ELIZABETH BURKET 
DAVID CLAPPER FREDERICK  (Mar 1891-1932/1933)
|           +--JOHN HENRY CLAPPER  (1699-ABT 1760)
|        +--HENRY I CLAPPER  (ABT 1718-1796)
|        |  +--MARY SWANK  (1702-1752)
|     +--HENRY I CLAPPER, JR  (ABT 1750-4 May 1813)
|     |  +--CHRISTENA    (ABT 1726-1810)
|  +--JOSEPH N CLAPPER  (27 Nov 1808-5 Jun 1879)
|  |  |  +--ABRAHAM NICEWONGER 
|  |  +--EVE NICEWONGER  (ABT 1754/1760-)
+--BARBARA M CLAPPER  (1840-1894)
   +--BARBARA STRAYER  (ABT 1814-BEF 1908)