The spelling of the word "Jermyn" may seem puzzling at first glance. However, it can be pronounced as /ˈdʒɜːmɪn/. The initial "J" is pronounced as the phoneme /dʒ/ which makes a "j" sound. The next letters "erm" are pronounced as /ɜːm/ which produces the sound of "ur" in "burn". The last letters "yn" are pronounced as /ɪn/ which gives the sound of "in" in "bin". Hence, the word "Jermyn" is pronounced as "JER-min".
The word "Jermyn" does not have a well-documented etymology as it seems to be a place name or surname rather than a word with a specific meaning. It is possible that "Jermyn" originated as a variant spelling or phonetic adaptation of the English place name "Jerusalem" or the personal name "Jeremiah". However, without more historical context or records, it is difficult to determine with certainty.