Giovenco rhymes with:
ivanyenko, lourenco, marchenko, norenko, renco, alanco, bairnco, barranco, capobianco, carranco, defranco, delbianco, difranco, evancho, gianfranco, hybrienko, ivanko, ivanyenko, lobianco, lourenco, marchenko, norenco, norenko, panebianco, polanco, renco, ronco, runko, sancho
Giovenco sounds like:
g'vanni's, gabbing, gaping, gapinski, gasping, gaufman's, geving, gibbens, gibbins, gibbons, gibian's, giovanni's, giovinazzo, givenchy, givenness, givens, givens's, giving, givins, goffman's, goofing, gosbank, gossiping, gubbins