An haifi Maryamu a ranar 18 ga Fabrairun 1516 a Fadar Placentia a Greenwich, Ingila. Ita ce kadai 'yar Sarki Henry VIII da matarsa ta farko Catherine na Aragon da ta tsira daga jariri. Mahaifiyarta ta sha wahala da yawa. Kafin haihuwar Maryamu, ciki huɗu da suka gabata sun haifar da' yar da aka haifa da 'ya'ya maza uku da aka haife su, ciki har da Henry, Duke na Cornwall. Maryamu ta yi baftisma cikin bangaskiyar Katolika a Cocin Observant Friars a Greenwich kwana uku bayan haihuwarta. Iyayenta sun hada da Lord Chancellor Thomas Wolsey; babban kawunta Catherine na York, Countess na Devon; da Agnes Howard, Duchess na Norfolk.
Sarki Henry na takwas