Present-day Yen Lac is one of the five villages of Moc Nam Commune, Duy Tien Town, Ha Nam Province. Old villagers say most local people are immigrants. In the past, Yen Lac was dwelled by a small number of households. Thanks to its abundant land and riverside location which is favorable for fishery, many people have settled and mainly lived by the river and fished for living. This is why the village was named An Lac or Yen Lac (meaning Peace and Joy) as people came here for a stable life and a joyful work. They strive for an affluent and peaceful life in this new land.