Christian Kaufmann is not a recognized author in this extract, which details the surname's origins and notable individuals.
The provided text discusses the surname Kaufmann and its variations, such as Kauffmann, Kaufman, and Kauffman, noting its German origin meaning 'merchant.' It then lists several individuals with these surnames across various fields and nationalities. These include figures like Isaac Kaufmann Funk, an American editor; Kaufmann Kohler, a German-American Bible scholar and rabbi; Fritz Kauffmann, a German composer; Georg Friedrich Kauffmann, a German Baroque composer; Fritz Kauffmann (bacteriologist), known for the Kauffmann–White classification; Henrik Kauffmann, a Danish ambassador; Jean-Paul Kauffmann, a French journalist; Lillian von Kauffmann, a Danish businesswoman; and Stanley Kauffmann, an American film critic. The extract also briefly mentions related surnames and a department store chain. There is no specific mention of a Christian Kaufmann as an author within this information.