The surname Costello is of Irish origin and means “fair-haired”. It is derived from the Gaelic “O’Coistealbha” or “MacCoistealbha” which translates to “son of Costello”. The Costello family is said to have originated in County Mayo and became a prominent family in the region. Today, the surname is found throughout the world, with many descendants of Irish immigrants carrying the name. Notable Costellos include American politician and diplomat, William Costello, and Irish musician, Elvis Costello.
