Bobby (Robert?) Caldwell

Biography
I'm on the trail of PA Caldwells, and am new to this. Do you know anything about this line: Robert Caldwell, born 1833, in Allentown (?) PA, moved to Iowa in 1855 and married Phoebe Bennet.. Robert had at least two siblings: William, b 5/29/1835 and married Maggie Donaldson in 1859; James, b 7/25/1837 married Sara Eason 1862; Samuel B, born 10/16/39 and Magggie J, b 5/9/1842, died 1/17/91, married Seth Foresman in 1866. Their Father was Robert Caldwell, Sr, who had at least two sisters: Nancy B and Elizabeth P. Don't know anything about Robert Sr. other than that. Would love to know more about Robert Sr., who I believe was born in 1803 though I don't know where. If you know this line, please get in touch here, or e-mail me at be49@yahoo.com. Thanks.
Ancestors
   
Joseph Caldwell
ABT 1740 - 30 Apr 1802
 
 
John T Caldwell
3 Apr 1776 - 3 Sep 1847
  
  
  
 
  
 
  
?
 
 
Elizabeth Eackler
6 Mar 1782 - 24 Oct 1859
  
  
  
?
 
Family Group Sheet - Child
PARENT (M) John T Caldwell
Birth3 Apr 1776Westmoreland Cou, Pennsylvania
Death3 Sep 1847 Palmyra, Ohio
Marriage1800to Elizabeth Eackler
FatherJoseph Caldwell
MotherJane McGrew
PARENT (F) Elizabeth Eackler
Birth6 Mar 1782
Death24 Oct 1859 Palmyra, Ohio
Marriage1800to John T Caldwell
Father?
Mother?
CHILDREN
MJohn Caldwell
Birth16 Jan 1801Westmoreland County, PA
Death15 Mar 1870Edinburg Township, Portage County, Ohio
Marriage30 Nov 1819to Barbry Simons at Portage, Ohio
MJoseph Caldwell
Birth
Death
Marriageto ?
MUriah B. Caldwell
BirthFeb 1826
Death9 Sep 1902
Marriage20 Sep 1849to Susan Amelia Thorpe at Portage County, Ohio
MBobby (Robert?) Caldwell
Birth
Death
MGeorge Caldwell
Birth
Death
Marriageto ?
MSamuel Caldwell
Birth
Death
FUnknown - Believed to be Eleanor Caldwell
Birth
Death
MJames "Jim" Caldwell
Birth
Death
MUnknown - Possibly Putnam Caldwell
Birth
Death
UUnknown - Possibly Edwin Caldwell
Birth
Death
UUnknown Caldwell
Birth
Death
MNicholas Caldwell
Birth
Death
MWilliam Caldwell
Birth
Death20 Jan 1898
Marriage28 Apr 1846to Anna Maria Quiggle