CREATE TABLE table_68310 ("Name" TEXT, "Birth" TEXT, "Marriage" TEXT, "Became Consort" TEXT, "Ceased to be Consort" TEXT, "Spouse" TEXT)

Tell me the name of the person married to frederick ix
SELECT "Name" FROM table_68310 WHERE "Spouse" = 'frederick ix'
SELECT "Name" FROM "table_68310" WHERE "Spouse" = 'frederick ix'