Giffard rhymes with:
gifferd, gifford, byford, clifford, differed, gifferd, gifford, liford, lyford, sifford, twiford
Giffard sounds like:
gabbard, gabbert, gabehart, gabert, gabhart, gafford, gaspard, gaubert, gebert, gebhard, gebhardt, gebhart, geffert, gephardt, gephart, geppert, gevaert, gibbard, gibert, gifferd, gifford, gisbert, giuffrida, gizbert, gobert, goepfert, goffredo, goforth