What place of origin is listed for chả giò?

The listed place of origin for chả giò is Nam Kỳ.

Nam Kỳ is the historical Vietnamese name for Cochinchina, the southern region of Vietnam. The term was used especially during the period of French colonial administration, when Vietnam was divided into Tonkin in the north, Annam in the center, and Cochinchina in the south.

Chả giò is the southern Vietnamese name for a savory fried roll usually made with seasoned ground pork, mushrooms, vermicelli, and finely cut vegetables such as carrots, jicama, or kohlrabi. The filling is wrapped in bánh tráng, or rice paper, and deep-fried until crisp.

Regional naming creates a frequent source of confusion. In northern Vietnam, the comparable fried roll is generally called nem rán, while chả giò is the southern term. Gỏi cuốn is different again: it is the fresh, unfried roll that northern speakers call nem cuốn. Outside Vietnam, chả giò may also be labeled a Vietnamese spring roll or, less precisely, an egg roll.