 Other well-known members of the same generation of the family included his older half-brother Gabriel Bengtsson, Lord High Treasurer of Sweden, and his cousins, Axel Gustafsson, Lord High Chancellor, and Gabriel Gustafsson, Lord High Steward.Oxenstierna married Margareta Brahe in 1633, in her first marriage, which remained childless at the time of his death in 1643.His widow commissioned his final resting place, the Brahe burial chapel of Jäder Church east of Eskilstuna.