Gardner \g(a)-rd-ner, gar-dner\ as a girl's name (also used as boy's name Gardner), is of Middle English origin, and the meaning of Gardner is "gardener". Occupational name. There were two distinguished American families, the "blind" Gardner family famous for the Isabella Stewart Gardner Museum in Boston, and the "sighted" Gardiner family famous for Gardiner's Island on Long Island Sound. As a name for girls, it is usually a family name. Poet Gardner McFall.