Janson, Rudolf (Jansons, Rūdolfs)
Янсон, Рудольф
Born April 23, 1911, Latvia, Russian Empire; died after 1983, (location unknown)
Fuentes
Anderson, E. (1987). Rudolph Janson. In Latvju enciklopēdija, 1962-1982 (Vols. M-P 472) Amerikas latviešu apvienības; Latviešu institūts. (birth date and approximate death date)
literature.lv (birth date)