Keithly rhymes with:
keathley, keithley, keathley, keithley, bimonthly, blithely, deathly, earthly, fourthly, keathley, keithley, monthly, unearthly, worthley
Keithly sounds like:
kadel, kastel, kastl, kastle, keadle, keathley, keatley, keidel, keitel, keithley, kestel, ketola, kettell, kettle, kettlewell, kiddle, kidwell, kittel, kittell, kittle, kostal, kotila, kotula, kudla, kudlow