Katzin Yulian (Julian) Fayvutovich (8 September 1908, Dvinsk (now - Daugavpils) — ?) — physician, psychiatrist.

In 1927, Yulian Katzin entered the Faculty of Medicine at the University of Tartu. In 1931, he moved to Basel (Switzerland), and in 1934 graduated from the Faculty of Medicine at the University of Basel.

From 1934 to 1936, he worked as a doctor at the Polyclinic of Nervous Diseases and in a psychiatric hospital in Basel. From 1936 to 1939, he was employed as a doctor at a psychiatric hospital and at the Institute of Child Defectology in Zurich.

In 1939, he returned to Daugavpils, where he worked as a physician at the Daugavpils Psychiatric Hospital. In June 1941, he was evacuated to Vyazniki, Ivanovo Region, where he worked as a neurologist at the N. Semashko Polyclinic. In November 1941, he was appointed head of a department at the Saratov Regional Psychiatric Hospital.

In 1945, Yulian Katzin moved to Riga, working as a psychiatrist at the 4th City Polyclinic. From 11 May 1948, he served as a psychiatrist at the Republican Neuro-Psychiatric Dispensary in Riga. At the same time, he lectured at the Riga Pedagogical Institute, holding the position of Associate Professor in School Hygiene.