If your surname is Osterhaus, there is little chance that you are a direct descendant of Peter Joseph. If you know of an Osterhaus ancestor, you may be related through the many female descendants. I didn't include all of their names here but please contact me if you want more information.
Peter Joseph Osterhaus was one of three sons born to Joseph Adolf Oisterhusz and Eleanora Kraemer in Koblenz, Westphalia. One brother, Lorenz, never married. The other, Anton Heinrich, married Katharina Roesgen and had five sons and five daughters, all in Europe.
Although Peter Joseph had many descendants, I believe there are only three living who bear his name: my mother, Elizt="83" alt="" class="fl2">Ludwig (Louis), one of a pair of twin boys, was born in Kreuznach in 1866 at his grandparents' home while Peter and Amalie were en route to Lyon, France where Peter was to begin an eleven-year stint as U. S. Consul there. Around 1904, Ludwig, a lawyer, returned to live in the U. S., settling in Belleville IL and marrying Josepha Andel, daughter of one of his dad's old war cronies. He practiced in Belleville until his death of gangrene after minor foot surgery. He and Josepha were childless.
Josef, the other twin, died in his twenties in Johannesburg, South Africa. He may also have been an officer in the German army. He married Maria Aller and had one daughter, Mathilde, a pediatric nurse married to pediatrician Hans Roscher.
Mathilde Nathalie was born in Lyon in 1869, moving with her family to Mannheim when she was about eight. She ultimately married Hermann Petersen, a physician and medical school professor who directed the Bonn Polyclinic. They had three daughters, one of whom, Thesi, was a concert singer, and two sons who died in World War II, according to a relative.