1860 Philadelphia Census Henry Voelker, age 35, occupation-Provision Dealer, born- Olive? or Clive?, Hessen. Catherine Voelker, age 31, born, Hesse-Darmsdadt? Caroline Voelker, age 11, Lena?, age 3 George Spahmon? Age, 40, occupation Baker, born, Hesse-Darmsdadt. (Same household, same born town as Catherine, Maybe a brother)
This info is listed on page 372 and a George Voelker is listed on page 369, maybe related?
Not my line of Voelkers, so I can't help beyond this information supplied. Sorry for the ? marks, but the handwriting of the person who entered the journal is difficult to read.