Listed is a Lou Spath who died in 1872 at age 38; Anna Magdalena Spaeth 1839-1909 and Louis Spaeth 1859-1910.
Whether the younger Louis and Magdalena's state death certificates would have more data is hard to say.
The younger Louis and Magdalena's obituaries may be helpful. Check with the Philadelphia Free Library to see if they can help you. The cemeteries they are buried in may have something in their records that may be helpful. Check with the Historical Society of Pennsylvania and the Philadelphia Family History Center to see if they can help you.