本文在近年論者所提出「杜甫生母出自『博陵崔氏』」之說的基礎上，重新檢討「杜甫詩中兩位可考之舅氏人物為『崔頊』、『崔俠』」此一衍生說法，以廓清杜甫親族人物相關基礎研究當中部分業已常受徵引的疑誤。「崔頊」於《新唐書‧宰相世系表》中確實存在，但其人並非杜甫詩中所曾提及的「白水崔少府十九翁」，而是與「十九翁」均出自博陵崔氏之同一房支的同輩疏屬；杜甫舅氏「十九翁」的名姓實應作「崔頂」始為正，此可於南宋蜀刻十二行本的五十卷本權德輿詩文集《權載之文集》，以及千唐誌齋新收之〈崔□伯誌〉的記載當中得到確證。至於「崔俠」，其人亦見載於《新唐書‧宰相世系表》，藉由千唐誌齋新藏之〈崔俠誌〉中對於誌主世系、官歷的清楚記載，可以判知此「崔俠」實非杜甫的「二十三舅」；「二十三舅」的姓名，應依據《宋本杜工部集》中所保存之杜甫自注的記載定作「崔偉」為是。

Based on the theory that the biological mother of Du Fu（杜甫） was actually a member of the Bo-ling Cui families（博陵崔氏）, this article reexamines the historical identity of Du Fu’s two matrilateral uncles, “Cui Xu”（崔頊） and “Cui Xia”（崔俠）, in order to correct the frequent errors in previous scholarship by analyzing ancient records, epitaphs and other historical documentation and comparing the investigations on those old editions of the collections of all the writings, which were containing compositions and poems, of both Quan De-yu（權德輿）and Du Fu. It point out that there was indeed a “Cui Xu” in “Tables of the Chancellors’ Genealogies” of XinTangShu（《新唐書‧宰相世系表》）. However, this “Cui Xu” was not the “Nineteenth Elder”（十九翁）, who was one of Du Fu’s matrilateral uncles mentioned in Du Fu’s poems, but in reality a remote cousin of “Nineteenth Elder” himself. Instead, the correct name of the “Nineteenth Elder” was “Cui Ding”（崔頂）, which was proved by both Quan De-yu’s collected essays, printed in the Southern Song Dynasty, and an epitaph of the Bo-ling Cuis’ member collected by the QianTangZhiZhai（千唐誌齋）. As for the “Cui Xia”, this name was also found in “Tables of the Chancellors’ Genealogies” of XinTangShu, yet this “Cui Xia” was actually not Du Fu’s “Twenty-third Matrilateral Uncle”（二十三舅）. This historical fact could be verified by Cui Xia’s ancestry and conspectus of official service recorded in his epitaph, which was also collected by the QianTangZhiZhai. Furthermore, the annotations written by Du Fu himself in The Collection of Du Gongbu（《杜工部集》）, which was published in the Southern Song Dynasty, showed that the name of Du Fu’s “Twenty-third Matrilateral Uncle” should actually be “Cui Wei”（崔偉） rather than “Cui Xia”.