The name is most likely derived from the conjunction of ljung (Calluna) and by (village).
Åstorp has also been connected with railroads to Landskrona, to Eslöv via Klippan, to Markaryd-Ljungby and to Höganäs-Mölle although traffic is discontinued and most of the tracks have been removed.
Vikings followed the river Lagan and lived in its vicinity, and one of the locations were in what is now Ljungby Municipality.