Sully is of Irish origin, derived from the surname Ó'Súilleabháin. It is composed of the elements 'súil' meaning 'eye,' and '-bhán,' meaning 'white.' Thus, Sully translates to 'visionary' or 'one with bright eyes.' This name gained prominence in Ireland during the Middle Ages and has since become more commonly used as a given name.
"The name Sully experienced significant growth in popularity over time, with a steady increase from the late 90s to its peak around 2008-2012. However, it appears to have slightly declined since then, but still remains quite popular."