杰克琳 transliterates 'Jacqueline':
杰 (jié) for 'Ja-',
克 (kè) for '-c-',
琳 (lín) for '-line'. The most prominent bearer in Chinese-language media is former US First Lady Jacqueline Bouvier Kennedy Onassis.
琳 'fine jade' is a common transliteration character for English '-line/-lyn' female name endings (compare
凯瑟琳 Catherine,
卡罗琳 Caroline).