In August 1922, Baer married Ellen Lohnstein (1902-1998), a daughter of Ludwig Lohnstein (1872-1943) and Maria Lohnstein (
née Kann; 1881-1955). His in-laws relocated to Geneva after
World War II. They had four children; • Marianne Baer (1923-2011), married Jorgen Likke Olson (1923-2006) •
Hans Julius Baer (1927-2011), long-term president and chairman of
Julius Baer Group, married Ilse Kaelin (1920-2008); two children • Ruth Irene Baer (born 1930), married to David Rudolf Speiser; four children • Thomas August Baer (born 1937), an attorney in Erlenbach, married firstly to Heidi Wolff-Limper (born 1940), secondly to Monika Bettschart (born 1932); no children Baer died 13 December 1940 aged 48, shortly before the family planned to emigrate to the United States. His family went to Princeton, New Jersey after his death arriving in May 1941. In 1950, his wife would remarry to fellow scientist
Hermann Weyl. == Literature ==