Definition of "Jill"

"Just Jill, I'm afraid." "Would you prefer if it was Gillian?" "Oh, I think so. Gillian sounds so much fancier." "Fancy?" Terrence said. He smiled at her. "Or perhaps it sounds flashy?" "Royal," Richard said. "Flowery," Terrence added. "You could say Gillian was more flowery. That would fit. What about you, Corrie, what does it sound like to you?" "Rich," Corrie glanced at Jill. "Gillian sounds richer than Jill."

1994, Floyd Skloot, Summer Blue, Story Line Press,, page 98

Our wooing doth not end like an old play;Jack hath not Jill; these ladies' courtesyMight well have made our sport a comedy.

c. 1595–1596 (date written), William Shakespeare, “Loues Labour’s Lost”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene ii]