Fran is a Spanish and Italian name (respectively Francisca/Francisco and Francesca/Francesco), and a common abbreviation for the English names Frances and Francis:
<!-- nickname "Fran" not mentioned on his page *Francisco Gonzalez (born 1955), Paraguayan tennis player --><!-- redlink *Francisco Gonzalez, Spanish moto racing driver in 1950s --><!-- nickname "Fran" not mentioned on his page *Francisco Pérez (born 1978), Spanish cyclist -->