Misetymology

Floridelphia may be euphonious but it’s a bad case of misetymology. It is the name given to a town located in the extensive tract of Florida land purchased by the Disstons of the handsaw fame.

Source: wiktionary

In the Institute itself, [Noah] Webster has a second sort of division, each page being divided roughly into two parts by a horizontal line, below which occur Webster’s misetymologies of particles—if comes from give, yet from get—along with sage observation.

Source: wiktionary

Let us not be falsely naive by aiming heavy cannon at the etymology "tsum esn." It was merely a groundless suggestion offered by someone who did not know the etymology accepted in Yiddish linguistic circles; by dint of repetition in the popular prints, "tsimes < tsum esn" has become accepted in unknowledgeable circles. We shall not waste any more time or space on this misetymology.

Source: wiktionary