http://catdir.loc.gov/catdir/toc/fy0610/91075137.html may be of interest:
John Christian Schlegel of Berks County, Pennsylvania and descendants / by Mary Irene Savage.
Baltimore : Gateway Press ; Las Vegas, NV : Book orders to M.I. Savage, 1991.
CHAPTER I. FIRST GENERATION
1. JOHN CHRISTIAN SCHLEGEL, IMMIGRANT . . . . . 5
CHAPTER II. SECOND GENERATION
11. JOHN CHRISTIAN SCHLEGEL . . . . . . . ... . 13
CHAPTER III. THIRD GENERATION
111. CHRISTIAN [CONRAD] SCHLEGEL . . . . . . . 25
112. ELISABETH SCHLEGEL . . . . . . . . . . . . 32
113. JOHANNES [CONRAD] SCHLEGEL . . . . . . . . 33
114. ABRAHAM [CONRAD] SCHLEGEL . . . . . . . . 35
115. DANIEL [CONRAD] SCHLEGEL . . . . . . . . . 37
116. BARBARA (SCHLEGEL) KEIM . . . . . . . . . 44
117. HEINRICH SCHLEGEL . . . . . . . . . ... . 47
118. WILHELM [VOGEL] SCHLEGEL . . . . . . . . . 53
119. PETER [VOGEL] SCHLEGEL . . . . . .. . . .61
11A. CATHARINE (SCHLEGEL) FAUST . . . . . ... .65