Ethelbert rhymes with:
engelbert, adelbert, albert, calbert, colbert, culbert, dalbert, delbert, elbert, engelbert, englebert, filbert, gilbert, gilberte, guilbert, halbert, helbert, hilbert, holbert, hulbert, hulburt, hurlbert, hurlburt, inglebert, jalbert, kolbert, philbert, silbert, talbert, tolbert, walbert, wilbert, wolbert