The name Jermyn, of English origin, is derived from the Old English word 'ger-', meaning 'spear', and 'mynn', which means 'strong'. It was historically used as a given name, but has also appeared as a surname in some instances. The name Jermyn was popular during the Middle Ages, though it has since become less common. Today, it is still occasionally used, contributing to its unique vintage charm.
The name Jermyn saw its peak popularity in the late 70s and early 80s with eight babies named Jermyn born each in 1976 and 1978. This trend continued into the early 80s, but began to decline thereafter. In total, there were 52 babies named Jermyn between 1972 and 1984.