Oskar Klein was was the youngest son of Sweden' s first rabbi, Gottlieb Klein, who was originally from the Southern Carpathian. Gottlieb Klein received his doctorate from Heidelberg and moved to Sweden in 1883.
Oskar Klein ay ay ang bunsong-anak ng Sweden 's unang rabi, Gottlieb Klein, na orihinal na mula sa Southern Carpathian. Gottlieb Klein natanggap ang kanyang titulo ng doktor mula sa Heidelberg at inilipat sa Sweden sa 1883.