My grandfather, Nick married my Grandmother, Nora on the way from Italy. That's right, Nick and Nora. Look THAT up in your Dashell Hammet (very old cultural/literary reference. Rent "The Thin Man" with William Powell and Myrna Loy if you don't get it. Heck, they're a great series of movies - rent them even if you DO get it).
At the risk of stating the obvious, Guida is Italian for "Guide." Guida is the feminine version (of which I'm not, he said in a manly tone). Guido is the masculine. Guidi is the plural of which I guess we all are.
End of lesson. Always enjoy hearing from fellow paisans.
Son of Frank
Grandson of Nick and Nora of Foggia, Italy
(The spur in the heel of the boot that is Italy)