Charles Henry Derby, Dictionary of National Biography… (1889)
“ Fleetwood became a Swedish lieutenant-general in 1656, and, having left England in 1660, member of the council of war in 1665. In 1640 he married Brita Gyllenstjerna, of the family of that Christina Gyllenstjerna who, in 1520, defended Stockholm against the Danes. By that lady he had four sons and two daughters. He died 11 June 1667, and was buried at Nyköping. He was a man of great energy and prudence, much trusted by his superiors. ”
