露德 transliterates 'Lourdes' — the Pyrenees town where 14-year-old Bernadette Soubirous reported visions of the Virgin Mary in 1858.
露德圣母 'Our Lady of Lourdes' is a major Catholic devotion. The name is also occasionally used as a transliteration of the given name 'Lourdes' (e.g. Madonna's daughter).