Hereby rhymes with:
nearby, thereby, whereby, adl-tabatabai, bae, bi, buy, by, bye, bye-bye, chubais, drive-by, dubai, good-bye, goodbye, nearby, standby, thereby, whereby
Hereby sounds like:
harb, harff, harp, harpe, harpo, harrop, harv, harve, harvey, harvie, herb, herbie, herve, hervey, horrify, hruby, hurvey