Fichte, Immanuel Hermann - Aimed to secure a philosophical basis for the personality of God. Son of Johann Gottlieb Fichte. - http://www.iep.utm.edu/f/fichteih.htm
Krzywicki, Ludwik - 19th-century Polish Marxist thinker. - http://www.fmag.unict.it/~polphil/PolPhil/Krzywi/Krzywi.html
MacColl, Hugh - 1837-1909. Pioneer of symbolic logic and the philosophy of logic. - http://www.hf.uio.no/filosofi/njpl/vol3no1/
Hello, Ernest - 19th-century French philosopher and essayist. Article from the Catholic Encyclopedia, by Susan Tracy Otten. - http://www.newadvent.org/cathen/16044b.htm