Nan 南
*Nangong 南宮
Nangong (南宮) is a two-syllable family name from the city name "Nanguo 南郭
*Nanguo (南郭) is a two-syllable family name from old city name "Nan 難 / 难
*Nan (難) is another family name based in Henan but originate from Xianbei surname "Tunan" (吐難) during the