 Aeningia was probably a corrupted form of "Aestingia" (Estland) and referred to the area of the present-day Baltic states and northern Poland.Some early European historians interpreted the name as a corrupt form of Finland, constructing a hypothetical Latin name "Finningia" as the original name.This probably originated from Olaus Magnus who was the first to place "Finningia olim regnum" on the map in 1539 or from Jacob Ziegler, who placed Finlandia and Einingia next to each other in present-day southwestern Finland in 1532.