Elvy rhymes with:
castellvi, elvie, helvey, helvie, melvie, selvey, alvey, calvi, castellvi, elvie, falvey, helvey, helvie, hulvey, malvie, melvie, ogilvie, ogilvy, olvey, salvi, selvey, silvey, silvi, silvie, stalvey, sylvie
Elvy sounds like:
elbe, elbow, elf, elfie, elliff, elope, elva, elvia, elvie, eyelab