Your details on these person are unfortunately very scanty. Was Peter for example already married? If yes: What was the name of his wife? What was the name of his parents? Many open questions . . . In a district of Cologne I could find a Peter Burgwinkel in an old family bible from this district; perhaps is this your Peter? This Peter Burgwinkel was born in Cologne as a premarital child 20. 8. 1898. His parents were Peter Lorenz Burgwinkel and Anna Maria Christina Weitere. Peter and his wife shall have had two children: Daughter Bettina and son Josef; but he was died in the WW I.