Means "spear of strength", derived from the Germanic elements ger
"spear" and thrud
Gertrude the Great was a 13th-century nun and mystic writer. It was probably introduced to England by settlers from the Low Countries in the 15th century. Shakespeare
used the name in his play 'Hamlet' (1600) for the mother of the title character. A famous bearer was the American writer Gertrude Stein (1874-1946).