CREATE TABLE table_69583 ("Birth" TEXT, "Marriage" TEXT, "Became Consort" TEXT, "Ceased to be Consort" TEXT, "Death" TEXT, "Spouse" TEXT)

Name the became consort for marriage of 4 april 1721
SELECT "Became Consort" FROM table_69583 WHERE "Marriage" = '4 april 1721'
SELECT "Became Consort" FROM "table_69583" WHERE "Marriage" = '4 april 1721'