First name content excerpted from The Complete Idiot's Guide to 30,000 Baby Names © 2005 by Marcia Layton Turner. Buy this book online or call 1-800-253-6476.
Last name content copyright © 2006 Patrick Hanks.
Last name origin & meaning:
Italian and Portuguese (Dionísio): from the personal name Dionisio, from Latin Dionysius (see Dennis 1.)