索碧斯基的第一個名字「莉莉安(Liliane)」是她的祖母的名字。中間名「艾爾賽維塔(Elsveta)」取自「伊莉莎白塔(Elżbieta)」,即波蘭語中的「伊莉莎白(Elisabeth)」[5]。她的外祖父羅伯特·所羅門(Robert Salomon)是猶太人,美國海軍上尉。外祖母是阿什肯納茲猶太人和荷蘭人的後裔。索碧斯基出生在一個「泛宗教」家庭,並為此感到自豪[6][7]。她於2001年畢業於崔佛·戴學校(Trevor Day School)[8],後在布朗大学學習文學和美術,但沒有畢業[9]。
^According to interview at a fansite: Leelee Sobieski. Interview. 访谈 with Eric Mitchell. leeleesobieski.com. 2006 [2009-05-15]. (原始内容存档于2006-10-24). See also People Summary. www.veromi.net. [2011-12-06]. (原始内容存档于2014-09-06); Aaron Hillis. Leelee Sobieski's Blissful Adulthood. IFC.com. 2010 [2011-06-22]. (原始内容存档于2010-08-20); Thailan Pham. Leelee Sobieski’s Big Apple Baby: Daughter Lewi!. People.com. Time Inc. 2010-08-22 [2011-07-22]. (原始内容存档于2011-05-07). Some sources incorrectly give her birthdate as 1982: Samantha Miller. Blithe Spirit. People magazine. 2001-11-12 [2009-01-06]. (原始内容存档于2009-02-05); "Don't Walk All Over Leelee", News of the World Sunday Magazine, 2008-02-03, p28; Celebrity birthdays on June 10. The Miami Herald. [2010-11-23]; On This Day. learning.blogs.nytimes.com. [2011-07-25]. (原始内容存档于2011-08-20).