Ox·en·stier·na also Ox·en·stjer·na 
(ksən-shĕr′nə, ŏk-), Count Axel Gustafsson 1583-1654.
(ksən-shĕr′nə, ŏk-), Count Axel Gustafsson 1583-1654. Swedish politician who virtually ruled Sweden as leader of the council of regency during the minority of Christina (1632-1644).