According to some, 'lilium' is the latinized form of Greek 'leirion' (λείριον).Others theorize that both Latin 'lilium' and Greek 'leirion' are ultimately derived from an Egyptian word (or otherwise a word from one of the ancient Semitic languages), making neither 'lilium' or 'leirion' an authentic Latin or Greek word.
In the Catholic church, the lily flower is a symbol of the Virgin Mary. In paintings, Mary is often portrayed holding, crowned with, or standing near lilies.