Guide to Names

Kazimierz Jozef Horowicz lived from January 2, 1886 until September 23, 1920. He is buried in the Warsaw Jewish Cemetery. His name appears frequently in her diaries, particularly as someone she had a strong interest in.  Her diaries often abbreviate his name  in various ways, such as H., Horw., Kazi, etc.

According to one publiciation, he was a "Polish statistician. After studying at the Russian University in Warsaw, obtained a doctorate in Göttingen. Took up actuarial mathematics on returning to Warsaw." 

The photograph shown here is excerpted from one of a group of Polish students and stipendists in Göttingen during the summer of 1907.

There is a collection of letters from him to her in the Bern archives.

In addition, Polish archives mention that he was a  member of the Statistical Commission of the Citizens’ Committee of Warsaw. Warsaw, 1914–1919, and include the following documents from the Olszewicz collection from the period of the First World War:

1. Certificate of membership in the Committee for the Care of Reservists’ Families. Warsaw, 27 July 1914, fol. 1. [Seal in Polish and Russian: “Committee for the Care of Reservists’ Families”] 

2. Identification card of a collaborator of the Statistical Section of the Citizens’ Committee of the Capital City of Warsaw. Signed, among others, by K. Horowicz. Warsaw, 29 July 1915, fol. 2. [Seal: “Citizens’ Committee of the City of Warsaw”]

3. Invitation from the Citizens’ Committee of the City of Warsaw to the New Year’s greeting ceremony for the President of the City. Warsaw, 1 January 1916, fol. 3. 

4. Two medical certificates issued by the district physician in Łódź for Anna and Kazimierz Horowicz. Łódź, 25 April 1916, fols. 4–5. 

5. Admission card to the First General Congress of the Union of Poles of the Mosaic Faith from All Polish Lands. Warsaw, May 1919, fol. 6. F

Often referred in her diaries to by his last name, but also as Faj. [I note he shares first name with Kazimierz Jozef Horowicz, but think she only uses first name for the latter, but need to be careful.] Presumably, she met him in Zurich. Often referenced as a lost love interest. One diary entry has her meeting him again in April 1918.

From Wikipedia:

Kazimierz Fajans (Kasimir Fajans in many American publications; 27 May 1887 [in Warsaw] – 18 May 1975 [in Ann Arbor, Michigan]) was a Polish-Jewish physical chemist, a pioneer in the science of radioactivity and the co-discoverer of chemical element protactinium. He was nominated for the Nobel Prize 4 times — 3 times in Chemistry and once in Physics — but he was never honored.

Fajans was born May 27, 1887, in Warsaw, Congress Poland, to a family of Jewish background. After he had completed secondary school in Warsaw (1904), he studied chemistry in Germany, first at the university in Leipzig, and then in Heidelberg and Zürich. In 1909 he was awarded his PhD for research into the stereoselective synthesis of chiral compounds.