Magdalena Hesprich was the sister of my great great great grandfather John Hesprich.He emigrated with his father Peter and Mother Elisabeth (nee Schwerdorff)from Oberleuken, Germany in Saarland in 1854.My family has spelled our name very differently over the years.For example, in baptism records that I have from America/Germany our name has been spelled as Hesperich, Hessperich, Hesperg, Hessperg, and Hessberg.Most of my family that emigrated showed that they lived in Saarland prior to emigrating.Although I have found other information that our namesake really decends from state of Hessen.
Anyway, not to bore you but it seems that the spelling that you are using is holding you up.It seems that Frederick Hartz (Hirz) emigrated on Oct. 12 1857 on the ship "Russell" from Havre.He is the son of Anton Hirtz and Elisabeth Heisel.(Both also from Oberleuken)Anton is the son of Peter Hirtz and Maria Bock ( Anton, who passed away in Oberleuken was born in Helfant(Nov. 16, 1784), which is about 16km away)
The second child of my great great great grandfather John Hesprich was Frederich Hesprich.He was born on June 12 1865.According to the baptism records that I have the baptism was witnessed/sponsored by a Fredericus Hierz (In latin).No doubt the individual you are looking for.
I hope this helps you as I found this while trying to find information on my family.It seems to be accurate. Although I cannot say for certain.It does seem to correspond with other information that I have.