In Better Call Saul, what is the surname of Nacho?

Nacho's surname in Better Call Saul is Varga.

Ignacio “Nacho” Varga is a skilled operator connected to the Juárez drug trade. He initially works with Tuco Salamanca and later becomes trapped between the Salamanca family, Gus Fring, and law-enforcement pressure. His intelligence and desire to protect his father distinguish him from many other criminals in the series.

Nacho is not a Salamanca by birth. The Salamanca family includes Tuco, Hector, Lalo, and Marco and Leonel, while Varga is Nacho's own family name. His father, Manuel Varga, owns an upholstery business and rejects the criminal world. That relationship becomes the main reason Nacho attempts to escape the cartel's control.