Cornwallis \c(o)-rn-wallis, cornwa(l)-lis\ as a boy's name is of Old English origin, and the meaning of Cornwallis is "man from Cornwall". Surname used as a given name in the 19th century. Famous English general in the revolutionary War George Cornwallis lost the battle of Yorktown to Washington and Lafayette, but was later more successful putting down other colonial rebellions in India and Ireland.

Baby names that sound like Cornwallis are Cornall, Cornelius, Kornelis, Cornilius, Cornelus, Cornell, Cornelio and Corneille.