Tofta was a manor and important manorial lordship in medieval Sweden, located in Adelsö

Adelsö

Adelsö is an island in the middle of Lake Mälaren in Sweden, near southern and northern Björkfjärden. The administrative center of the important Viking settlement Birka was situated at Hovgården on Adelsö.-Geography:...

, Uppland

Uppland

Uppland is a historical province or landskap on the eastern coast of Sweden, just north of Stockholm, the capital. It borders Södermanland, Västmanland and Gästrikland. It is also bounded by lake Mälaren and the Baltic sea...

. Its most prominent holder was Charles Ulvsson, Lord of Tofta

Charles Ulvsson, Lord of Tofta

knight Charles of Tofta, a.k.a Karl Ulfson was a 14th century Swedish magnate and High Constable of Sweden.Lord Charles always signed himself as "of Tofta", which has given his whole ancestral lineage its later genealogical name, although his paternal grandfather for example did not possess Tofta...

, maternal grandfather of king Charles VIII of Sweden

Charles VIII of Sweden

Charles VIII of Sweden , Charles I of Norway, also Carl, , was king of Sweden and king of Norway ....

.

Charles VIII had an invented, partially fabricated genealogy published (see Nils av Tofta in Swedish) to create himself a descent from an invented granddaughter of king Eric IX of Sweden

Eric IX of Sweden

Eric "IX" of Sweden, , also called Eric the Lawgiver, Erik the Saint, Eric the Holy and in Sweden Sankt Erik meaning Saint Eric was a Swedish king c.1155 – 1160...

the Saint through some historically unattested earlier lords of Tofta.