gentilesse

The first line means—'With regard to, or As to the first stock (or source), who was the father of gentilesse.'
Chaucer's Works, Volume 1 (of 7) -- Romaunt of the Rose; Minor Poems|Geoffrey Chaucer
To which add, as a twenty-third, the three stanzas on Gentilesse quoted in Scogan's poem (no. 33).
Chaucer's Works, Volume 5 (of 7) -- Notes to the Canterbury Tales|Geoffrey Chaucer
See remarks (in the notes) on Chaucer's Balade of Gentilesse.
Chaucer's Works, Volume 2 (of 7)|Geoffrey Chaucer
Thou hast drawn all the thread out of my shift with thy gentilesse; thou hast tickled my heart with thy rebeck.
The Decameron of Giovanni Boccaccio|Giovanni Boccaccio

The 'cours d'amour, parlements d'amour, ou de courtoisie et de gentilesse,' had much more of love than of courtesy and gentleness.
The Moral and Intellectual Diversity of Races|Arthur, comte de Gobineau

British Dictionary definitions for gentilesse

gentilesse

/ (ˈdʒɛntəˌlɛs) /

noun

archaic politeness or good breeding

Word Origin for gentilesse

C14: from Old French gentillesse; see genteel

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012