Granoff rhymes with:
janoff, manoff, aronoff, belanoff, bogdanoff, chazanoff, chernoff, evanoff, fornoff, ilyaronoff, ivanoff, janoff, krasnoff, manoff, marinoff, rachmaninoff, sarnoff, sheshunoff, smirnoff, sosnoff, woronoff
Granoff sounds like:
greenup, grownup, grump, grumpy