Quiller \qu(il)-ler\ as a boy's name is of Old English origin. Possibly an occupational name. A quiller could have been a scribe, or someone who wrote with a quill pen.
Baby names that sound like Quiller are Keller and Cuyler. Other similar baby names are Quillen, Bueller, Fuller, Hiller, Miller, Muller, Mueller and Quillan.