Nama "Karl Heinrich Marx", yang memakai berbagai leksikon, berdasarkan pada kesalahan tulis. Sertifikat kelahirannya tertulis "Carl Heinrich Marx", dan di tempat lain, "Karl Marx" dipakai. "K. H. Marx" hanya dipakai dalam kumpulan syairnya dan transkrip disertasinya; karena Marx ingin menghormati ayahnya, yang wafat pada 1838, ia menyebut dirinya sendiri "Karl Heinrich" dalam tiga dokumen.The article by Friedrich Engels "Marx, Karl Heinrich" in Handwörterbuch der Staatswissenschaften (Jena, 1892, column 1130 to 1133 see MECW Volume 22, pp. 337–345) does not justify assigning Marx a middle name. See Heinz Monz: Karl Marx. Grundlagen zu Leben und Werk. NCO-Verlag, Trier 1973, p. 214 and 354, respectively.
Carver, Terrell (1991). "Reading Marx: Life and Works". Dalam Carver, Terrell. The Cambridge Companion to Marx. Cambridge, United Kingdom: Cambridge University Press. hlm. 11. ISBN978-0-521-36694-6. Diakses tanggal 30 May 2014.
Several authors elucidated this for long neglected crucial turn in Marx's theoretical development, such as Ernie Thomson in The Discovery of the Materialist Conception of History in the Writings of the Young Karl Marx, New York, The Edwin Mellen Press, 2004; for a short account see Max Stirner, a durable dissident
Kim, Sung Ho (2017). Zalta, Edward N., ed. "Max Weber". Metaphysics Research Lab, Stanford University. Diakses tanggal 10 December 2017. Max Weber is known as a principal architect of modern social science along with Karl Marx and Emil Durkheim.