Oskar Kokoschka | Oskar Schindler | Lee Oskar | Alfredo Kraus | Lili Kraus | Paul Oskar Kristeller | Oskar Sima | Oskar Pfister Award | Oskar Luts | Oskar Linnros | Oskar Kohnstamm | Oskar Fischinger | Oskar Eustis | John D. Kraus | Adalbert Kraus | Tadeusz Kraus | Oskar von Miller | Oskar Vogt | Oskar Sosnowski | Oskar Seidlin | Oskar Schlemmer | Oskar Piotrowski | Oskar Homolka | Oskar Heil | Óskar Halldórsson | Oskar Barnack | Charles A. Kraus | Viktor Oskar Tilgner | Peter Kraus | Oskar von Watter |
Kowalewski was a member of the Saxon Academy of Sciences, the Société Mathématique de France, and socially associated with members of the Louvre Circle and Prague intellectual elite, which included Berta Fanta, Oskar Kraus, Franz Kafka, Hugo Bergmann, Philipp Frank, Albert Einstein, and Christian von Ehrenfels.