Svealand was the original Sweden, to which it gave its name. This is supported by linguistics and is based on early medieval sources, such as the sagas. In Old Norse and in Old English, Svealand and Sweden are synonymous, and described as a separate country from Götaland/Gautland/Geatland.
In Sögubrot af Nokkrum for instance, Kolmården between Svealand and Östergötland is described as the border between Sweden and Östergötland (...Kolmerkr, er skilr Svíþjóð ok Eystra-Gautland...).
The lord Bo Jonsson Grip was probably the one who was best acquainted with the geography of the Swedish kingdom since he owned more than half of it. In 1384, he stated in his will that the kingdom consisted of Swerige (Sweden, i.e. Svealand), Österland (i.e. Finland) and Göthaland (i.e. Götaland).
The 15th century Swedish version of the Þiðrekssaga says that Vilkinaland was formerly a name for Sweden (Swerige) and Götaland: wilcina land som nw är kalladh swerige oc götaland.
For a time in the early 19th century, the province of Värmland belonged to the Court of Appeal for Svealand. Even though Värmland historically belonged to Götaland, it has by custom long been considered part of Svealand.