en ▁and ▁became ▁chief ▁engineer ▁in ▁a ▁tr uck ▁factory ▁near ▁Paris . ▁Her ▁mother ▁S ara ▁Wol sky ▁By str yn ▁( 1 9 0 6 – 2 0 0 3 ) ▁had ▁to ▁abandon ▁her ▁plans ▁to ▁study ▁in ▁Paris ▁for ▁financial ▁reasons ▁and ▁learned ▁making ▁h ats ▁and ▁cor sets . ▁K and el ▁was ▁born ▁two ▁years ▁after ▁the ▁marriage ▁( 1 9 3 0 ) ▁of ▁her ▁parents . ▁She ▁had ▁a ▁younger ▁brother , ▁Jean - Cla ude ▁By str yn ▁( 1 9 3 8 – 2 0 1 0 ), ▁who ▁became ▁a ▁known ▁American ▁der mat ologist ▁and ▁scient ist ▁at ▁the ▁NY U ▁Lang one ▁Medical ▁Center . ▁Both ▁parents ▁were ▁fl uent ▁in ▁French , ▁but ▁spoke ▁Y idd ish ▁at ▁home . ▁ ▁In ▁France ▁up ▁to ▁ 1 9 4 9 ▁ ▁The ▁family ▁lived ▁in ▁Colomb es ▁near ▁Paris , ▁and ▁K and el ▁attended ▁a ▁primary ▁school ▁for ▁girls ▁( E cole ▁des ▁F illes ). ▁The ▁children ▁grew ▁up ▁sec ular ly , ▁the ▁family ▁never ▁went ▁to ▁syn agog ue , ▁and ▁they ▁had ▁presents ▁at ▁Christmas . ▁In ▁ 1 9 4 1 , ▁when ▁K and el ▁was ▁eight , ▁and ▁one ▁year ▁after ▁the ▁German ▁invasion ▁of ▁France ▁during ▁the ▁Second ▁World ▁War , ▁Den ise ’ s ▁father ▁was ▁arrested ▁as ▁" fore ign ▁Jew " ▁and ▁intern ed ▁approximately ▁ 1 0 0   km ▁south ▁of ▁Paris ▁in ▁the ▁Naz