1550s, "to stuff or interline in the manner of a quilt; to stitch together in the manner of a quilt," from quilt (n.). Related: Quilted; quilting. Quilting bee, "a social gathering of women for the purpose of assisting one of their number in quilting a counterpane," usually followed by a supper or other entertainment, is attested from 1824, originally a New England custom (see bee).
<a href="https://www.etymonline.com/word/quilter">Etymology of quilter by etymonline</a>
Harper, D. (n.d.). Etymology of quilter. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/quilter