Here are the results from a search in UVa's Middle English database for the term 'gentilesse':
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   32 matches
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    1. [AnoChan159]  gentilesse and kyndenesse ~e whiche hit
       hath lik
    2. [Cha2Can102] now of youre gentilesse That we with
       pitous herte u
    3. [Cha2Can226]autee and thy gentilesse, For al thy song
       and al th
    4. [Cha2Can231]y, agayns his gentilesse, quiten hym So
       vileynsly t
    5. [ChaTroi138]gh, and ek of gentilesse --If she be
       fayre, thow wo
    6. [ChaTroi160]uthe and alle gentilesse,Wisdom, honour,
       fredom, an
    7. [ChaTroi184]ap and ek his gentilesse,But moost hire
       fauour was
    8. [ChaTroi186]te and ek his gentilesse,And thus she
       seyde, "al we
    9. [ChaTroi218]nere, and his gentilesse,So wel that
       neuere, sith
   10. [ChaTroi256]f trouthe and gentilesse,As I wel mene,
       ek menen we
   11. [ChaTroi260]ully maad thi gentilesse triste,That al
       shal ben ri
   12. [ChaTroi268]ost, calle it gentilesse,Compassioun, and
       felawship
   13. [ChaTroi294]bounte don ne gentilesse." Q
   14. [ChaTroi300]use I for the gentilesse. "
   15. [ChaTroi306]el meneth but gentilesse. B
   16. [ChaTroi318]souneth in-to gentilesse. ChaTroi320[ChaTroi326]His gentilesse, and how she
       with hym mette,How myght a
       wight in torm
   18. [ChaTroi546]uthe and alle gentilesse. ChaTroi548[Gower1.75 ]yhthod and of gentilesse,And how he stod of cous
   19. [Gower1.82 ]that for pure gentilesse,As he hire
       couthe best
   20. [Gower1.239]I wot, of hir gentilesseThat sche me
       wolde wel ex
   21. [Gower1.269]Withoute pite gentilesse,Withoute
       mercy wommanhe
   22. [Gower1.360]anhode and of gentilesse,For the
       gentils ben mos
   23. [Gower1.360]t the name of gentilesseUpon the
       fortune of rich
   24. [Gower1.362]6>Where I mai gentilesse finde.For
       lacke of vert
   25. [Gower1.362]i that wel be gentilesse,Which yifth
       so gret a s
   26. [Gower1.363]wther good ne gentilesseMai helpen him
       whiche yd
   27. [Gower1.441]ove and ek of gentilesse,Of worldes
       lust and of
   28. [Gower2.172]manhede, hire gentilesse,Myn herte is
       full of suc
   29. [Gower2.407]he is of gret gentilesse.Hise dedes ben
       therof wi
   30. [Gower2.460]l n=8.2741>Of gentilesse and pure troutheI herde
 
 
                             MIDDLE ENGLISH WORKS
 
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   [AnoChan158]
   o concidre thes premisses and theruppon to graunte a writte sub pena
   directe to the
   19 same william Rachedale to apper by fore you Att A certeyn day be
   you to be lemytedd ther to be examined vppon thes premisses
   20 as good feithe & concience requireth for the loue of god & way of
   charte Plegium de prosecutio Radnus Clerk Iohanes Bernewell
 
   [over erasure]
   "text" n=129
 
                        DATE: 1435 REFERENCE: SC1/44/45
   LETTER OF RICHARD, DUKE OF YORK, POSSIBLY TO JOHN FRANK, MASTER OF ROLLS
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   pg 159
   1 Right trusty & entierly welbeloued frende / I grete you often tymes
   wel / And thanke you with al myn hert of ~e grete
   2 gentilesse and kyndenesse ~e whiche hit hath liked vnto you / to
   shewe herebefore aswel vnto me / as vnto myn officers &
   3 seruantes atte reuerence of me / Prayeng you hertily of good
   continuance / And for asmuche / as for suche materes
   4 and ~inges as I shal haue adoo and to poursue in oure souuerain
   lordes courtes in Irlande / hit is right nedeful
   5 for me to haue certaine personnes ~ere and to haue auctorite and
   power of ~e kyng oure saide souuerain
   6 lord forto bee myn attournees / I pray you with al myn hert / ~at
   hit like you / forto doo make lettres patentes
   7 vnder ~e kyng oure saide souuerain lordes seel in deue fourme /
   forto endure iiij. ye
 
                             MIDDLE ENGLISH WORKS
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                       AN ANTHOLOGY OF CHANCERY ENGLISH
                                   ANONYMOUS
 
   Conversion to TEI-conformant markup
   University of Virginia Library Electronic Text Center
   ca. 585 kilobytes
   Middle English, AnoChan
   Available from: Oxford Text Archive, U-1676-B
   Date: 1993
 
                       AN ANTHOLOGY OF CHANCERY ENGLISH
   John H. Fisher, Malcolm Richardson, Jane L. Fisher
   xvii, 416 p., 6 p. of plates : ill. ; 23 cm.
   University of Tennessee Press
    Knoxville
 
   Date: 1984
   Includes bibliographical references (p. 52-62) and index
   The original text contains illustrations
 
   Keywords in the header are a local Electronic Text Center scheme to
   aid in establishing analytical groupings
 
   Date: 1384-1462
   Middle English
   prose; Non-fiction
 
   Date: January 1994
   David Seaman, University of Virginia Library Electronic Text Center
   Tagging brought into line with the OTA.DTD, and parsed

   Edward Gaynor,University of Virginia Library, Cataloging ServicesDept.
   TEI header revised
 
   Date: November 1993
   Peter-john Byrnes,University of Virginia Library Electronic TextCenter
   paginated
 
   Date: September 3, 1993
   Heidi Synnatzschke-Cochran, University of Virginia Library, Cataloging
   Services Dept.
   TEI header completed
 
   Date: July 1993
   David Gants, University of Virginia Library Electronic Text Center
   UVa header added
 
   Date: 1992
   John Price-Wilkin
   minimal SGML tagging added
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                             MIDDLE ENGLISH WORKS
   Click on the highlighted ID (e.g., AnoChan14) for fuller bibliographic
   information.
     _________________________________________________________________
 
   [ChaTroi138]
   i138
 
   869 And with that word he gan hym for to shake,
   870 And seyde, "thef, thow shalt hyre name telle."
   871 But tho gan sely Troilus for to quake,
   872 As though men sholde han led hym in to helle,
   873 And seyde, "allas, of al my wo the welle,
   874 Thanne is my swete fo called Criseyde."
   875 And wel neigh with the word for feere he deide.
   876 And whann that Pandare herde hire name neuene,
   877 Lord, he was glad, and seyde, "frende so deere,
   878 Now fare aright, for Ioues name in heuene,
   879 Loue hath byset the wel; be of good cheere,
   880 ffor of good name and wisdom and manere
   881 She hath ynough, and ek of gentilesse --
   882 If she be fayre, thow woost thy self, I gesse.
 
   883 "Ny neuere saugh a more bountevous
   884 Of hire estat, na gladder, ne of speche
   885 A frendlyer, na more gracious
   886 ffor to do wel, ne lasse hadde nede to seche
   887 What for to don; and al this bet to eche,
   888 In honour, to as fer as she may strecche,
   889 A kynges herte semeth by hyrs a wrecche.
 
   890 ["And forthi loke of good comfort thow be;
   891 ffor certeinly the ferste poynt is this
   892 Of noble corage and wel ordeyne,
   893 A man to haue pees with hym self, y-wis;
   894 So oghtist thow, for nought but good it
 
                             MIDDLE ENGLISH WORKS
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                             TROILUS AND CRISEYDE
                          CHAUCER, GEOFFREY, D. 1400
 
   J.D. Burnley
   Conversion to TEI-conformant markup
   University of Virginia Library Electronic Text Center
   ca. 485 kilobytes
   Middle English, ChaTroi
   Available from: Oxford Text Archive, U-1689-A
   Date: 1993
 
          TROILUS & CRISEYDE : A NEW EDITION OF "THE BOOK OF TROILUS"
 
                               GEOFFREY CHAUCER
   TEI header revised
 
   Date: January 1994
   David Seaman, University of Virginia Library Electronic Text Center
   Tagging brought into line with the OTA.DTD, and parsed
 
   Date: November 1993
   Jamie L. Spriggs,University of Virginia Library Electronic TextCenter
   paginated
 
   Date: September 1, 1993
   Michael Bernhard, University of Virginia Library, Cataloging Services
   Dept.
   TEI header completed
 
   Date: August, 1993
   David Gants, University of Virginia Library Electronic Text Center
   UVa header added
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